I think you were a bit rushed
I agree, it would be a rushed decision to red tag or support a flag here, as the guy in the question is yet to be proved offering fake service. A DT could use neutral to alert about the service being unassured by anyone until it's proved.
My bad, I thought it's okay to create a flag in such a risky situation. I will now delete it.
Just to let you know flags can't be deleted.