DCist has been requiring comment registration as a spam-prevention measure for quite some time now, so hopefully our readers won’t be too surprised to learn that washingtonpost.com will begin requiring it on every one of their blogs sometime next week. Steven Goff first mentioned it on his Soccer Insider blog today, and Washingtonpost.Newsweek Interactive spokesperson Molly Gannon tells us that while registration has already been required in order to comment on news stories on the WaPo web site, they are only now implementing that same requirement on the Post’s blog properties. Seems like a lot of changes are afoot at washingtonpost.com this week; the Going Out Gurus got a redesign today as well.