That's not exactly an answer, that's just evading the question. I didn't ask him to guess, I asked him to check. Checking would confirm my assumption that the problem is due to the fact that those users are all on old versions of mIRC-- and therefore it's a complete non-issue if people just upgrade their clients. That is, this issue is not an "irc-wide" problem, it's related to one specific client. That means it will become less of an issue as people simply upgrade to 7.x. The issue isn't as complicated as implementing server-side anything. It's simply about educating users to upgrade.