Hey, will you collude with me?

[Joshssj4]

So I'm sitting down at a 2/4 limit heads up table and have taken close to 60bb off this guy within 20mins. After a while he asks for my aim, I decide he seems like a good buddy to have around so I add him. He then asks me to be his partner, that we would work together to have an edge over other players. I told him it was stupid/wrong, obviously, but that's not the point of the post. The question is what should I do about this, is it worth it to report it, or should I just allow him to be eventually caught? Thanks in advance.