You should not have Vac'a
Do not throw me a trade
And that you were at least funny, funny, talkative

I ignore the offer of friendship if you:
Hidden Profile
Game blocking (VAC ban)

From friends I delete:
Hidden profile,
Phishing (from your infected account)
Insult
Invitation to join a group (community)
The game lock (VAC ban) (There are exclusions) or blocking in the Steam exchange system.