Honestly I agree with you...im not against it... I just can't stand these whiners!!! If Blizz would put in a system where you could'nt just pk anything at anytime it would probably be fine....make it a request type thing. I gaurantee you even if this type of system was in the game , this forum would still be filled with "WTF BLIZZ why u take away hostilez??!?!?" period
As an avid PvPer, that has played nearly every PvP rpg type game in the past 10 years.
The hostile thing in D2 was a really bad system. People who grief are much different from people who enjoy competition. I also strongly disagree with open world PvP forced upon people who don't want it. If that is the argument, the PvPer making should lose.
I think both sides can alleviate lots of the fears that the fun they want out of the game will be ruined if you just think about what reasonably could happen.