Needing to have to use the bathroom in blitz.
2001-3000 Worst Things To Do While Playing Chess

2085 Break the rules of chess by moving your rook back and forth without leting your oponent touch his or her pieces.

Touching a piece on (On purpouse) But you meant to touch one piece and you (Not on purpouse) Touched a different piece. TOUCH MOVE!

2095 Making sily faces.
I would neber eber make sily faces on this forum thread. That's illegal.
Neighbor aiber doodat, peephole...
ChessPlayinDude47 discovers the tactic 1. e4 for the first time aiber...

Touching a piece on (On purpouse) But you meant to touch one piece and you (Not on purpouse) Touched a different piece. TOUCH MOVE!
2096. Playing touch move with your boogers instead of the chess pieces during the game.

2031 cyber bulling your opponent.
2099. cyber deering your opponent. How endeering...

2078 - Watching Sesame Street.
2100. Watching sesame paste dry on the wall while waiting for your opponent to move.

2033 shoting peas at the oppononent's queen.
2101. Shooting pee at your own queen and knocking her unconscious.
2090 - Crying after you lost.