Kozakista (might be wakalo)
Hitclub (might be anasto)
grynn. (mind the dot!)
Solomonk (might be anasto)
be aware these might be his too:
isaac_clarke, L_Streetfighta_L, NinjaInPijamas pokederp gaming_geek
I think gog.com really needs a thread to report scammers, so here you go.
edit: Hope i didn't make any mistakes.
Now, i'm not trying to start a witch hunt, this is just a list of untrusty persons.
Edit: Small update. Sorry for not updating, but i've been quite busy.