LordEntrails
Hero
I haven't seen any problems. Maybe it's because my players are not min/max'ers and I don't encourage that type of play. But I have found that there are GM tools to deal with any of these types of things. In the end, all I would have to do (but have never had to do it) is simply say, "Doing X is ruining the fun, therefore you are not allowed to do it."