Trying to fool guitarist soundman by starting out at half volume and gradually turning up - $500
Having more stage presence than singer or guitarist - $250
Knowing more theory than anyone else in band - $100
Playing guitar lead in unison - $100
Playing guitar lead and sounding better than guitarist - torture consisting of listening to guitarist whine for 24 hours straight
"Stealing" a solo during jam - $200
Use of bass tremolo - $200
Playing chords - $200
Playing entire song with LH while having a cigarette - $200
Belching into microphone at rock/metal gig - $100
Using open low B as pedal point - $300
Use of high C string - $75 per note
Use of high C string past 12th fret - life imprisonment in a lead guitarist's body
Bringing fretless to open jam on purpose so that nobody else will want to play it - $500
Asking for bass duet at open jam - $1000

I'm guilty of most of these!