Well it seems that something wrong was happen. I was playing when the vac message pop up, "you cannot bla bla.."
Though after restart steam, no ban on record and i'm still in good standing and Ghosts was connected to online game..
Used only this until now and i played more legit than possible.. until the message wasn't appears.
F**k then i opened CE in private match, thinking i was already vacked..
EDIT 27/06 After 24h it seem that i'm not vacked and still in good standing. Maybe 'cauze it was some steam issue, could be about vac stop working or 'cauze my DEP is disable by bios , anyway someone else has reported the same issue and has occurred time ago