Individuals who have a blatant disregard for the premise, including the intentions governed by the Game Master themselves. In this I mean not so much a discrepancy on power or ability - it all comes down to how one uses it, because a clever character can out wit and out perform most anything else - but more so the repeated in and out of game behavior of, "My character is going to do this (or can do this) if it is valid or not, plot and party be damned." A common example I see is rewriting of the exact same material to make it appear as though it were different and then submitting it again hoping the reviewer is fooled by the illusion that the problem has some how changed.

If you were told before it was not suitable, why would you just rewrite it using different words but otherwise identical? Being more descriptive, limiting or something of the sort even might work - compromise at best - but why try to wedge something in? What is there to be really gained from having everything?

Building off that, and equally related to out of game concepts of the same tone, when you are told to alter something by a Game Master because of a perfectly valid reason, why either try to twist the intent or ignore it? This is not exactly a winning battle in any case, and if the Game Master [i]is[/i] truly wrong and refuses to hear you out, being little more than a tyrant, perhaps you should bow out politely, but that scenario is not common. What is far, far more common are those who won't simply alter a post, which usually could have been avoided by reading the other posts in the first place, or adhering to the spirit of a topic and story.

Perhaps it stems from my mixture of tabletop optimization and start as a forum based roleplayer, but there's ways to handle these sort of situations without much issue; either revise the entire mechanism within the criteria or do not play. Admittedly I see it most where one tries to adapt a character who does not adapt well to the plot, and the adaptation is done poorly, but all the same it isn't limited there.