There are basically two types of "red mark" a punter could have on his AW profile: aliases and client notes.
Aliases occur when your AW account becomes linked with another, typically by using the same computer as another Aw member (WG or client) without deleting browser cookies between users. It's just a number, and drops off if you stay "clean" for about 6 months.
Client notes are notes that WG's can attach to punters. They can be tagged as green (good), amber (timewaster) or red (dangerous). Only verified Service Providers can leave them, and only verified Service Providers can see and read them (I don't know who can edit/delete them). They are supposed to be secret, and if AW find out that a WG has tipped you off about what they say, that WG will be denied access to Client Notes in future (this happened to Dani).
So ask a friendly WG to check you out, but DON'T do it openly, or you'll be getting her into trouble. Do it via PM on here, or via non-Adultwork email or text. You must have contacted her via AW at some point for her to be able to see your profile, unless you have Client Connections switched on (which makes you findable by all WG's).
Or you could do it the hard way, by creating an AW "Service Provider" profile, getting it verified, waiting a month for Client Notes activation, then sending an AW email to it from your regular profile to make contact. Even then, you won't see who left the note, or when, they are anonymous and not timestamped. If you're lucky, you might be able to guess from what it says.