There are already NPC invasions, so a PVP invasion is basically a harder NPC invasion to me. I’m already dying to regular bosses and NPC invasions, so another random add to the death count via occasional other players is just another /shrug. .
Granted, I’ve only had limited MP experience, but even from hearing friends who play PVP, there are basically established areas for PVP and even in those places, it’s not as bad as getting ganked outside of Crossroads in a WOW PVP server or anything.