Letting them know is one thing, banning certain IRC clients/versions is another. Are you banning any other clients because of exploits? If you're trying to prevent potentially exploited users from joining your network then surely you should ban every version of mIRC and indeed every Windows user. After all, Internet Explorer is built-into Windows which mIRC runs on, and IE is just a great big exploit bonanza. The point I'm getting at is that everyone can potentially be infected, no system is totally safe, if you want to educate users on the exploits in clients like previous mIRC versions then that's great, but if you want to ban every user who's at risk of getting a virus or trojan then you're gonna be on a very lonely network. In fact you won't be on it, because you're at risk too.
