That would not be a bad thing at the regional level. Imagine the chaos if all the regional pilots at your airline were off doing there own thing how they saw fit, your company would not be able to keep up.

The truth is unions (or associations for those airlines that don't have unions) do just as much to keep pilots in line, more so than a company could ever do.

Today when something goes wrong, unions are sued etc.. or have to worry about arbitrations and timelines, or violating contracts.

This is an honest question which I have no idea of the answer.

What if a regional airline dumped their union and did not form any other type of association to speak collectively on behalf of the pilots? What would happen? What would happen if 20 pilots just decided to call in sick as a work action. Or 30 pilots or 40. Who does the company complain too? Do they sue an individual pilot for not coming to work? Do they fire the entire group?

Think about it. Since you have nothing as a regional pilot anyway, I hypothesize things could be better altogether for a unionless group. My argument is the union keeps you inline better than the company ever could.