As a school board president it's pretty simple. You have a public forum and people can say what they want. But they also have to be respectful. If they are not interrupt them and give them warning. If it continues cut them off. If the crowd gets unruly clear the room. If they make threats have
local law enforcement handle it. Talk to the level headed people and explain to them that the idiots aren't helping their cause and they need to police them. If it gets bad enough there is no requirement, at least in Iowa, for public forum. CItizens have the right to attend the meetings but not to speak.
But we're generally not a bunch of dumb asses in rural Iowa and don't adopt things like CRT so I haven't had to deal with this.

If fascism ever comes to America, it will come in the name of liberalism. Ronald Reagan, 1975.
Progressivism is cancer
All my posts are satire