I don't know if I'd count on that.
I have heard people talking in pub lobbies on the mics on several occasions about having gotten their psn ID banned & had to make a new one, because they had basically been reported for annoying too many people. Well, obviously they didn't say it that way
But what they described was that they were griefing, and wound up getting their psn acct shut off somehow.
So what's to stop 20 people from reporting someone for griefing with hacked cars and them getting banned?
And sorry, but the report button is not just used by "sour pusses". Most of the stories I've heard where people used the Grief Reporting was because they were essentially being stalked. The person would send them numerous PSN messages harassing, each time they were blocked creating a new account to continue the onslaught.
If you're the victim of that sort of thing, I'd hardly call it sour grapes. 👎