They also do little for scamming and impersonation. People send me and I've even randomly come across profiles that have cloned my own name/picture/profile page in an attempt to scam people by impersonating me (using my inventory page to lure them in, hoping they won't notice the URL).

Virtually every friend I have met through CSGO that has skins has gotten scammed out of at least $100. Any time I give friends a knife to borrow or to have, they immediately get dozens of friend requests from scammers. The first time I gave a friend a knife it was stolen within two weeks by a fairly sophisticated scam.