The guy was in his rights, legally, flipping the bird. That is not illegal, it's protected under the first amendment, and there's nothing the cop can do about it. However, speech INCLUDES taking responsibility for your speech. And a lot of stuff for cops comes down to there judgment. They are able to put there attention where they wish, as long as they are punishing people breaking the law. Flipping off a cop does not protect you against getting in trouble with the cops. As long as the tickets are valid, the cops set.
Also, just because flipping off a cop isn't illegal, doesn't mean you shouldn't get called out for being a dick.
Also, just because flipping off a cop isn't illegal, doesn't mean you shouldn't get called out for being a dick.