Leave it to Captain Kirk to stir up trouble. Star Trek actor William Shatner took to Twitter today to complain about — well, Twitter. Their latest advertising move has ruffled some feathers, where the micro-blogging platform is essentially selling your friendship. By putting promoted accounts in your ‘Following’ list, Twitter is taking an interesting trip down a dark path. The first offender is MasterCard, where Shatner noticed they’d popped up in his Following list, though he didn’t follow them at all.