Hanging the flag upside down is suppose to be a distress signal (not used just because we don’t like the way things are going, but an actual distress signal to alert people that something is wrong in that exact area). A lot of people use it these days as a form of protesting the war or whatever else they are upset about. I think that by using it as a form of protest, people have taken away from the true meaning of hanging it upside down.
I personally will never hand a flag upside down. I don’t like seeing them upside down in protest of the war either. If people want to protest the war, that’s fine, but I just feel like it’s disrespectful to use our flag, which holds a lot of significance to our soldiers, as a protesting tool.