any college guy who talks like Ray is probably some crazy nut. it's so obvious that he stole it, but like you said, there's no "proof".
one of the funniest, most underrated moment is when jerry calls kramer from ray's house.
"(Whispering into the phone) Kramer! Kramer!.. It's Jerry!.. Jerry! .. from next door!.. Never mind where I am!.. YES, Jerry Seinfeld!.. "
I can just picture kramer on the other line
"who's this? Who? Jerry who? where are you? Jerry Seinfeld?