Bizarre Plot Ideas for Harry Potter and the Half-Blood Prince
I got it! I know how Harry can bring back Snape to work for the good dise! See, Snape has some rather "embarassing" photos taken of him with Voldemort (another DE has doen this for Voldemort's photo album of ewness). Colin Creevey, picking up photos from the Wizarding photo developer is accidentally given the wrong photos. He realises the goldmine he has and hands them over to Harry. Harry uses then to blackmail Snape and Snape, because he's got his dignity to preserve (Voldie uses him as his 'girlfriend' and in humiliating ways) agrees to come back over and help defeat Voldemort, although there is one condition. Snape gets a crack at treating Voldemort as HIS girlfriend and while Harry goes "ew" he agrees. Colin takes pictures and upon returning to the Muggle world, posts them on the internet. Harry wins, Snape wins (I think).