Where do I report a possible scammer/untrustworthy person on this site?

[Batgirl]

I'm confused...again lol

[Balletdancer]

what the fuck balls, i hope it is not some one i know i will be so choked ;(

[metaldroga]

I'm lost, updated me pls

[Kylae]

She's been told to post up a dispute but still has not, and there's no proof the person in question did anything yet.

[Lilac Tentacles]

Stop teasing me you bastards!!!!!