The first is: http://www.deathandtaxesmag.com/193157/federal-judge-rules-flipping-off-cops-is-legal-lawyer-calls-it-a-civil-rights-victory/. The second, I'm not sure of.
Okay. Give it a try next time you’re around a cop. He won’t do anything. Other limits on speech include slander and perjury. My point is that free speech has its legal limits.