I don't actually have an amp, I either use my Dad's amp (who in all irony doesn't play guitar) or the system at my church when I'm home for break.

On the other hand, there are a rediculous number of tone-deaf sh!theaded guitarists in the town I'm from who literally refuse to learn anything new or right. Seriously, the other guitarist at my church tries crap like playing an Asus and Dsus on a song in E just because he likes suspended chords. That makes 4 consecutive semitones in two places on the scale, if my theory is still decent. It doesn't work. Or he'll try crap like trying to do acoustic sim by using a $50 piece of inferior craftsmanship with damaged active pickups and banging away at it as hard as he can in the bridge position so it has more 'presence'.

So, I can't say I've never thought of putting a nail or two through someone's equipment.