Re: So ...
"I'd have immediately brought the place to its knees"
If it was my company you'd be the one fired on that spot for something like that. Second time anyway.
You wouldnt be doing it a 3rd time.
For some reason I'm picturing "Master" from Mad Max 3 holding the town to ransom with a power embargo.
Also If your users are not well disciplined enough to not do that , you need to lock the ports to mac addresses. And if they are allowed to bring their own shit in , you need to take measures that said shit cannot do any damage no matter what state its in.