My DM/GM would not stand for this one bit, in fact many years ago playing 2nd edition AD&D a player character turned on me when I put on some enchanted armour that we found, he didn't like this and promptly attacked me. The DM didn't like this one bit but he kept calm and began to explain that as we were fighting a Roc began to approach us, and lo and behold said Roc picked up the player and flew away with him, never to be seen again!
The player in question wasn't impressed but he got over it!
Also I've never come across "homebrew" characters in 28 years of gaming, why are the rule books written? What's the point if players can make over powerful characters?
