You will remain safe on all airlines unless you are refusing an order of the crew and police on the aircraft. If you feel like you should be treated like a God because you spent $150 for a flight then you should increase your travel budget and fly private.
This thread is total click bait and if you don't feel 'safe' on an airplane then don't fly United. Every airline in the past year has forceably removed a passenger from a flight (and I would argue a few of these are not the right thing to do but they did it) so I guess you should just take Greyhound to avoid having the chance of being removed from a flight:
-Southwest: http://www.wowt.com/content/news/Unruly-passenger-forces-unscheduled-Omaha-stop-for-Southwest-flight-416562003.html
-Delta: http://www.freep.com/story/news/local/michigan/wayne/2016/12/13/detroit-delta-flight-san-diego/95366536/
-American: 2 Muslim American Women Ordered Off American Airlines Flight https://nyti.ms/2aUzoy6
JetBlue: http://abc7ny.com/news/passenger-removed-after-verbally-harassing-ivanka-trump/1668529/
-Alaska: http://www.foxnews.com/travel/2016/10/12/rowdy-passenger-reportedly-removed-from-alaska-flight-for-harassing-attendant.html