> If no response happens, leave it the hell alone and get the hell out as soon as possible.
That's the worst advice one could follow. If you don't care, to the point that you'll just walk away, don't even bother to "question the situation politely and in firm terms", just cave in from the start.
If you're not willing to stand up for yourself, either the situation isn't important to you or you don't deserve better than what you're receiving. If a mugger points a gun at you and demands your wallet, give it to them -- if you don't, you'll lose more than your wallet. If a person in authority oversteps their bounds, protest to the furthest legal extent that you can. If you don't, you won't bring attention to the problem and thus you only contribute towards making things worse.