[Fester Chugabrew]

. . . detaining, ticketing or arresting someone for the content of their speech is illegal.

The law allows for exceptions. Try telling flipping the bird at a cop, or telling a judge to KYA.

[RinaseaofDs]

I think you can flip a police officer off, but the later, in a courtroom, would be contempt of court.

Out in the world, you can flip a judge off without a problem, I would think.

[IYAS9YAS]

Try telling flipping the bird at a cop, or telling a judge to KYA.

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.