Most annoying, unforgivable, inexcusable plays in sports

Mark Bellhorn striking out with the no outs and the bases loaded made me want to do a list of what drives me absolutely crazy watching sports. Athletes who do the following should be locked up:

• striking out with bases loaded and no outs
• walking the pitcher
• balks (not the lefty ones where there's a fine line between a good pickoff move and a balk. The mindless ones.)
  
• false starts
• missing free throws
• missing an empty net
• missing extra points

I'm sure there's more. Feel free to add to the list.