Ppl dipping in and out of zones that let them phase to another realm is the biggest issue in my mind. Its like WoWs version of Vietnam and gankers are just jumping the border into Laos. This has had a negative effect on the responses of pvpers on my realm for sure. Before 10 or so ppl were always ready to respond to one of the few pvp/defense channels claims of cities being pinged. Now almost nobody does because the ppl doing it just jump back to their realm or into another zone phasing them. Since you also don't run into the same ppl with the frequency you used to one your own realm nobody really pays attention to the usual suspects like they used to.