In general:

The way I see it, anyone can download what they want but we don't offer the help because of the trojans etc, mIRC shouldn't be held responsible, the user is telling mIRC to download hazardous/malicious files mIRC doesn't think to itself, "gee, I want this file it might do me some good, I'll automatically download it and hope the machine I'm running on doesn't muck up". I know I wouldn't want to be respsonsible for newbies downloading virii and then coming back and complaining to me that their machine is switching itself off and other stuff. It is against the law, we wont help them break the law, but it's their choice if they want to get in deep. We can't truly stop them, although we can do our part by not helping them with such issues.