1) Doing this purposely seems like a good way to get on the wrong end of some legal process, and is exactly the sort of thing that would end up being somehow fixed in a way that only works for Hollywood and not anybody else.

2) The major studios don't really use YouTube, and Netflix and Hulu and Spotify don't use ContentID. If the entire site was destroyed along with all of their smaller competitors that do use it, they would only celebrate.