Please don't do to DU what FDev did to ED. Please do not cater to the carebears. FDev neutered the you-know-what in that game.
Don't get me wrong, I am all in favor of reducing opportunities for senseless griefing and ganking. Personally, I favor team-based PvP. But anyway... ganking, attacking others who are weaker than you, either one-on-one or in groups, is a legitimate strategy in combat. Anti-PvPers (if what happened to ED is any lesson) tend to complain too loudly and too often about even the most minor PvP-like incidents. Eveerything they don't like becomes "ganking" or "griefing".
All I am saying is please tread lightly when attenuating PvP. For many people, PvP is fun. Give those who don't have the fortitude for PvP a place to be where they don't have to deal with conflict. But please, please make PvP compelling, preferably favor a team-based approach, and provide strong incentives to willingly participate in PvP.
Thank you.