Please define "a lot" and "not safe." I personally know "a lot" of them and have worked on hundreds of sets for many generations of talent. And I've hung out with "a lot" of talent off set both professionally and for fun. Not once have I seen the things that you allege. Yes, there are a few fucked up guys out there, and some get outed on social media. But there are as many girls who paint themselves the victim they are not, including Mia mentioned above. And this is coming from crew who shot her multiple times and whom I know personally.
If your info comes from experience on set, you are clearly on the wrong kind of set. If your info is something you read or heard, maybe you want to vet your source better. This is no different than the misinformation that is often spread by the naive public about SP's. If, on the other hand, this is how certain producers run their productions in Canada, your girls need to shoot south of your border or in Europe.
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