It seems difficult as a consumer or voter to take action in regards to safety and engineering concerns with the MAX series of airlines. Collective action might work however, if companies' travel policies include a statement that travel on MAX series aircraft won't be reimbursed. This is a good choice anyways as employees are valuable and losing one unnecessarily is not good for the company. Although total catastrophes have been rare, the most recent door issue was insanely lucky: the two empty seats on the plane were exactly the two next to the blown out door, if they had been occupied, at least one of the passengers would likely have sustained fatal injury.