Yes, but wouldn't it just be like J.K. Rowling to throw good ol' Tom Riddle into a different house than Slytherin? There has been some speculation that he could have been in Gryffindor...but that'd be too weird.
And like Luna said, there wasn't a witch or wizard who went bad that wasn't in Slytherin, so it's pretty safe to say that Voldie was a Slythie.
BUT, what about James Potter and Sirius Black and Remus Lupin and Peter Pettigew? Didn't Wormtail go bad? So, he was most likely a Slytherin, if what Ron told Harry is true. And also, wouldn't it make sense for the other three to be in seperated houses, too? Like James in Gryffindor, Remus is Ravenclaw, and Sirius in Hufflepuff? The personalities suit to the houses, really.
Any other views out there? (I love debating this stuff!

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