In the situation you've described here, I think you're right. How about if I stand with my arms out, you've worked your way down to my waist and, with my arms out, I close my 2nd, 4th and 5th fingers, giving you the finger? Before you answer, please remember the holding in Cohen v. California Superior Court, as well as the First Amendment prohibition on state-actor limitations on petitioning the government for the re-dress of grievances?

And how about this: you ignore the twin birds, finish your "enhanced pat-down" and say, "You're free to go. Thank you." I gather my belongins and, as I'm leaving, I say (not shout, but calmly speak), "F*** you," and then leave. Have I interfered?