Negative rep from a suspended user

a lot of users will just take a quick look at profile, won't go in depth into researching where the actual -rep actually came from.

Also especially for a fresh trader it may be an issue - if you have hundreds of +rep and just one -rep ppl will be willing to trade with you. But if like this example this -1 makes 16.6% of his overall rep a lot of ppl will not even open his trade thread when they see another thread from use +5/-0 next to it for the same game ;)