But it's still not preventing you from sending a strongly-worded letter, text, email, or calling your local official. It also depends on what the agenda was, and why it was against the rules. For all we know, there's probably a whole bunch of things that led up to this moment -- on both sides. As far as "banning everything," there's a huge gulf between "this specific meeting is not for lodging complaints at specific officials" (which was what the Mayor took aim at -- a general statement might have worked for all we know) and "don't talk about anything here ever."
What perhaps bothers me the most about this is that she was bewildered that she was even accused of trespassing when she knew it broke the terms of the meeting. If you loaned me your property for a day and told me that I could do anything but that one thing there, and then I did that one thing you told me not to do -- I'd be technically trespassing on your property for as long as I did that one thing.
I will say that maybe I am a little biased here because we have what I call the "publicity stunt queen" -- the Green Party's Jill Stein (G-CA I think?) She showed up at a debate as part of the "Occupy the Debate" stunt, where she planned to have her supporters take over the Presidential debate stage in 2016 and 2020 since she didn't qualify for the debate, then whined about how a "presidential candidate" got arrested. If you show up under threat of rushing the debate stage -- you're gonna get arrested. In 2020 -- it was even worse because her supporters got arrested, but she didn't that I can recall. So anything that reminds me of pulling a stunt like hers does start me out as biased against the person instigating the arrest -- in this case, the speaker was politely, but assertively, asked to sit down and she refused, then got bewildered about getting arrested and mentioned the presence of her 10-year-old son as a way to somehow get more speaking time. To me, using children as political pawns is actually worse because most children do not understand what's going on to begin with, nor are they willing participants.
(The video of her doing this is somewhere on this thread…)