Does limiting WHERE you express yourself infringe upon free speech?

It does infringe upon free speech to limit where you speak, and these nuts are the ones who must unfortunately remind us. Freedom is never easy to give, and is hard to defend when you have people waving signs saying "thank god for dead soldiers" and "thank god for ieds" in front of the men who gave their lives to make sure they could do it. Overall, I feel that they should, unfortunately, be able to wave the signs. I just hope the policeman looks the other way when I smash them in the face.