I just think about this, what they are doing is not exactly dangerous, but it is a VERY bad habit to get into. If they do a dozen gigs or so here and there and then decide to get something more power, the stakes go up. I doubt they would work their way up to a vag burner, but then again, they could be the next "Nation's Best International DJ" with 20 watts of q-switched green. Even 1 or 2 watts of green is cheap power and 1 or 2 watts is a different ball game.
If you're the smartest person in the room, then you're in the wrong room.