Amateur Radio Club Telegram Groups: Handling Fake Rig Sellers, Exam "Answer Keys" and Net-Night Spam

• What actually goes wrong in radio club chats
• Rules that fit the hobby
• Screening new members without gatekeeping
• Make the swap topic harder to abuse
• Automate the routine removals
• After a field day or hamfest

Plenty of ham radio clubs now do their day-to-day talking on Telegram. A typical club chat holds net-night reminders, repeater outage reports, swap-meet listings, licence-exam study tips and pictures of antennas that went up last weekend. Trading, newcomers and technical links in one place attract spammers, so the chat needs some structure.

This article walks through a setup that works for a local radio club or a regional repeater group of a few hundred to a few thousand members.

Disclosure: we develop 虾宝 (Xiabao), an anti-spam bot for Telegram, and it costs nothing for group owners. Keep that in mind while reading.

§What actually goes wrong in radio club chats

Radio groups see a fairly specific set of problems. Knowing them makes rule-writing much easier.

Too-good-to-be-true transceivers. A “silent key estate sale” listing offers a popular HF rig at half the usual used price. The seller wants a bank transfer, cannot meet at the club, and the photos turn out to come from an old auction listing. Estate sales are real and common in this hobby, which is why the story works.

Exam answer keys and “guaranteed pass” courses. New members preparing for their licence exam are targeted with paid PDFs that claim to contain the real question pool answers, or with “coaching” that requires a deposit. Question pools are usually published openly, so anyone selling secret answers is selling nothing.

Modified-firmware downloads. Links to “unlocked” firmware for handheld radios show up regularly. Some are genuine hobby projects; others are installers bundled with malware.

Net-night floods. A weekly net announcement is predictable, so spam bots sometimes time a burst of crypto or adult links for the moments right after it, when the most people are reading.

Fake callsign accounts. Someone copies the profile picture and display name of a well-known club member, including their callsign, and messages newcomers privately with an offer.

§Rules that fit the hobby

Club rules should protect trading and newcomers without scaring off the quiet majority who just want to know if the repeater is back up.

1. Swap listings go in one place. If the group uses topics, create a “Swap & Sell” topic. If not, require a fixed format: item, condition, price, location, and whether the seller can meet at a club event.
2. Meet-in-person is the default for gear. Ask that higher-value equipment changes hands at a meeting, a field day or a hamfest whenever possible. When a remote sale is unavoidable, pay through a service that offers buyer protection.
3. Study material comes from the club. Pin the official question pool link and the club’s own study notes. Paid exam material from members needs an admin’s OK before it is posted.
4. Firmware links only from the project page. Members may discuss modified firmware, but the link must point to the original project, never to a re-upload.
5. Callsigns are checkable. Encourage members to put their callsign in their display name, and remind people that anyone can look a callsign up in the public licence database before trusting an offer.

§Screening new members without gatekeeping

Most radio clubs want newcomers, including people who are not licensed yet. A light join question works well: “Are you licensed? If so, what is your callsign; if not, what got you interested?” Real people answer happily, often with a story about a grandparent’s shortwave set. Bulk spam accounts usually do not answer at all.

If the group is public, turn on join requests during busy periods such as exam season or the run-up to a large field day, when the group link gets shared widely.

§Make the swap topic harder to abuse

Trading is where real money is lost, so it deserves extra care:

• Ask sellers to post a photo of the item next to a slip of paper showing their callsign and the date.
• Remind buyers in the pinned message that the club never asks anyone to pay in advance for an “estate” item sight unseen.

§Automate the routine removals

Volunteer admins have day jobs, and many also run the weekly net, so nobody watches the chat at every hour. An automated filter takes care of the repetitive part: bulk ad links, crypto pitches, adult spam and copy-paste scam messages.

Xiabao looks at every message the moment it lands. Promotional links and known scam wording are wiped, accounts that keep trying get a warning and then a ban, and talk about antennas, propagation and contest logs is never touched. If you want to see how the filtering works and how to add it to a club group, the Xiabao overview for hobby and club group admins explains the setup, which takes only a few minutes. The bot itself is @xiabaotg_bot, and it is free for group owners, which suits a club budget.

§After a field day or hamfest

Big events bring a wave of new joiners through shared links on flyers and social media. Once the event is over:

• Rotate the invite link.
• Review recent joiners who never posted and have no callsign or join answer.
• Repost the swap rules, because post-event selling is when the “estate sale” stories reappear.

A radio club chat that stays readable keeps the club itself healthier: newcomers ask more questions, experienced operators stick around to answer them, and the swap topic stays a place where people actually find good gear.