Yes you are right, less users look there, which is why it is always the perfect place to hide a virus, why give mIRC the easy ability to do that?
And exactly how would you hide a virus in the windows registry, from the mIRC command line? The answer is: You can't.
If a person has to accept a file off you for registry commands to be harmful, then your safety argument is null and void. Things such as sockets are potentialy more harmful than registry commands, once a file is received.
We've already mentioned that /regwrite can be disabled from command line. A few of you made an attempt to say that reigstry manipulation is useless in return, now what? The commands can be made safe.
Ignoring Anti-Virus advice and enabling WSH so mIRC can do $windir and $regread is moronic.