Sorry for the minor clickbait title

Let's talk about ISPs in USA. In my personal opinion, they do so much "bad" things to their clients, as opposed to, most noticeably, Europe (I guess it's because, (at least in my country, IDK about another European states) much bigger competition, even in village with 500 people, there are about 3-4 ISPs, but there are even more of them in bigger cities). They throttle websites (even before they destroyed Net Neutrality), they track that you use your network too much and throttle you because of it ("they may send you a warning for excessive internet usage and throttle your bandwidth for awhile.").

Now, they track that you download/upload too much and/or pirate movies and can throttle your account, downgrade your account, or completely refuse to provide you any service.

Why? Why are they allowed to do this? Why they can track users and throttle them just because they download too much (I've read article about it, downloading too much, ISPs slowing down internet for few hours, link soon) or they suspect you of pirating. How they dare intercept your packets, read them and throttle you because of this? Why is it wildly accepted as completely normal behaviour?

And I could continue on things like them publicly buying votes to remove Net Neutrality from the way, and so on.

I honestly do not know why so much people are OK with this. Could we start a discussion on this?

Throttling because of piracy sources: 1 2 3 4
Pre-NetNeutrality-End websites throttling: 1 2