$40 is entry and air only. No paint. The higher price is to cover the prize package at the end of the day.
As for threatening behavior, tempers flare; people are stupid and unwilling to take responsibility for their own actions (walking into a wall of paint and then get mad about it). Despite that, threatening behavior is unwarranted. Staff at Asylum has ejected players from events and even off the property for this behavior. I dare say this is standard policy at all fields. Sometimes it just takes a ref talking to the offending player and they themselves make amends.