ELSEWHERE IN SPAM REDUCTION:

It's unclear exactly what the banned domains had been doing to provoke the move, and the site's administrators have not publicly commented on the specifics of any given case.

"There's not a public list because we felt that'd be too much of a 'wall of shame' for the domains involved. That said, it's completely transparent in that you know we don't allow the domain rather than silently spamfiltering," lead programmer Neil Williams wrote in a discussion on the site.

Reddit implemented the domain-level ban functionality a week ago, saying at the time that "we're initially rolling this out for link-shorteners which have long been discouraged on Reddit as they conceal the true destination of the link."

While general manager Erik Martin confirmed in another discussion that the bans are temporary, no information has been forthcoming on their exact length. Systems administrator Jason Harvey added that Reddit has been in direct communication with the owners of the affected domains.