PvP-only servers would at least divide the amount of PvP glitchers. I know that some do the glitch for attention, while others do it just for fun. Having a PvP only server would at least draw those who do the glitch for fun to that respective server. They may be heavily outweighed compared to those who want attention, but I would think that any decrease in the number of PvP glitchers would help.
Adult only servers serve no purpose. For one, you can have those who lie about their age to get on that server, and then bring the trouble over with them. Also, just because one is of a mature age, doesn't make them mature. I've seen older players who act down-right terrible, and yet I also see younger players who have such fine attitudes and maturity levels. "You can only be young once, but you can be immature all your life."
