> who was being harassed or distressed by the people holding signs
Most of the other people there. Quite simply, you don't go to that place at that time to hold up that sign, or you're in danger of disturbing the peace. Other times, maybe OK.
> or the man who asked about charles?
That one is different. In my opinion, he shouldn't have been arrested because he was voicing discontent during the enactment of our pseudo-democratic process ("Who elected him?"). A good place and time to protest, if you ask me.