Speaking of exloiting terrain for pvp purposes, my semi-preform came across some Silver Hand (ally) pre-form a few weeks ago (WSG weekend) and there was this female shadow priest who would stand on some terrain, and everytime one of our warriors (or any melee) tried to attack her, they would DC. We all got a good laugh out of it over vent when we got the obligator "WTF did I just DC?". Then when we sent a rogue after her, same thing, then another warrior, same thing again (We were now down to 4 players from our team). Eventually we figured out she was exploiting *something* but we couldn't figure out how she was doing it. We eventually just sent me after her, and fortunately she wasn't able to DC my felguard >
Net net, we still won the game 3-0 or something, but this one shadow priest was able to play it out by an extra 20 minutes by DCing our three MA's.