Suggestion: Data-Center-Wide Blacklist

I've noticed a disturbing trend of so-called "elite" players in Duty Finder/Duty Roulette insulting/trash-talking others they see as "beneath" them. I'd like to be able to add these people to my blacklist so I don't have to encounter them and their negativity again, but the vast majority of the time there is no way to do so, as the Blacklist function currently supports one's own server only.

It's not usually worth the time or effort to report them for infraction of ToS for such; I just want to be able to /ignore them and move on.

tl;dr: If the player pool for DF/DR covers the entire data center, then the Blacklist function really should, too.