Details please.
Which parents were creating the chaos, and which parents were arrested?
I think the general idea is to turn these school board meetings into a theater of sorts....getting parents arrested and brought into a monkey-court later...so discipline can be dispensed out.
If your board has reached a screwed up stage....remove the kid, give up on the board ever recovering, and quietly move on. As student numbers diminish...the board will lessen its own importance and eventually dissolve into nothing.
As for schools having significance? You can probably assess a fairly high number of upcoming graduates as being ‘dumber’ than when they entered the sixth grade.