I don't think that abusing it and not making others play is the only reason.
Sometimes when a player is fuked twice a row you can glitch it out and make it so he is playing and a clone of him is the 1st in the queue.
Which can pretty much be a pain to fix since you can't kick/ban/fknock/fspec... the clone, and sometimes led to reports and annoyed a few hosts/GMs.