...do everything you can to chain him down....He's going to feel down, and underpowered.....and something to fear about anyone that feels backed into a corner.....Players find a way to do things that **** their GM over when they feel bullied, that's one thing I've learned. You remember Jurassic Park? "Life will find a way"
DEAR GODS you are so right, about a year ago I actually hear a couple of my players actually call it "**** the GM" as a kind of secondary game to the one I was running. This pissed me off more than a little because it ment that they were playing to crew around with the story and not actually play their characters. Since then I've stopped trying to tailor the game to what the players were doing at the time and started more just planning out when and where things would happen and where people would be and how they would react to different situations. This has led to less "**** the GM" mini-games among my players and has thrown in a more realistic aspect for my players becuase unless they actually pay attention and do what needs to be done cites may be destroyed and players may die. (both have happened BTW) I have had players fail campaigns before becuase of this, they are usually not to happy, but I think its more fun to leave the gloves off and let things actually play out.
On a further not, the one player that was really inciting the "**** the GM" sentiment is no longer around for my games, mainly becuse he became and arse and had a falling out with pretty much everyone in the group, but still not there. Once in a while the players still try to mess with me but since I run the game a bit differently now the only thing they can do to actually mess up the campaigns is to just kill themselves, than what good would that do them? I actually had one who wanted to crash 2 continents together to try to wipe out two different factions of people. Sure this would change the story a bit, but hey if he can actually figure out how to do it in game, and not die in the process, feel free, might be fun to watch if nothing else :-)