If it's in a corporate environment (support = IT staff), then I'm in full agreement. They'd want to string someone up for a stunt like that.
But for an individual (which is the impression I have here), it's a possibility if they're willing to deal with the compromise of self support. That said, I still wouldn't bother if the system is being used to generate an income, as the downtime is too expensive if a major issue occurs (get behind on output and miss deadlines = pissed off clients = and loss of business due to unreliable reputation that's sure to follow).
I don't want to go down this way. It is OT.
It's "illegal", that's enough for me ...