I can't speak for why he only has two negative ratings, since I was inactive when that event happened,
lutpin has not provided any evidence of the debt (or even the specifics of the dispute) that I am aware of, and if memory serves me correctly, prior to this incident they said they would lend to eachother on various gambling sites, and other off-site communications mediums to arrange the loans.
So this amounts to being not much more than lutpins word, although I don't recall mexxer publicly responding to this. Without at least knowing the specifics of lutpin's claims, I don't think it would be appropriate to remove him without giving him the opportunity to respond, which is really not possible because nothing has been alleged beyond the vague 'he owes me money'