People already use mIRC to chat on MSN Messenger and a variety of other chat networks (I know that was just an example but I'm saying that the scripting language allows things like that already)
Anyway, again, why do you care how people use mIRC if you don't have to use it that way? The only time I care about how people are using mIRC is when people come here thinking mIRC is for something other than what it is (ie: filesharing)