To put another angle on it ...
If we assume that the request is legitimate, then what is wrong with telling the requester that mIRC is not the best tool for the job and to search elsewhere for other tools that are?
As discussed many times, mIRC is optimised for Chat, other things (FTP, File sharing, movies, music, picking noses etc)
I can use a tyre iron to nail bits of wood together, I can also use stickytape to stop my fish tank from leaking - it doesn't mean that is the best way to do it.
Cheers,
DK
p.s. I agree that we should not sully oursourlves assisting the majority of ppl who want to do illegal things, but maintain the balance and help those who genuinely need it.