The only reason content finder ruined community aspect of an MMO is because in game like WoW you have many characters hence there is no real need to keep your reputation except 1 or 2 of your character. It's difference when you have only one character.

I am sure community will came out with Blacklists thread if cross-server dungeon content is ever implemented. I personally pro on content finder because it helps out alot of people especially when our subs number will never soar as much as WoW does.