Quite common if you were to watch a movie online for free. Not on Amazon Prime or Netflix of course, but not all movies that I am interested in is available on Netflix, Amazon Prime in my region.
Is it merely coincidental that the sites where you're most likely to find pornographic advertisements happen to be websites for pirating media? Which aspect of these websites are politicians truly clutching their pearls over? The part about morality and kids, or the part about media corporations and money?
To the cynic in me, the answer is obvious.
You mean those streaming sites, where the page is 3/4 advertisements? Yeah, I image those have porn ads, but adblock helps there too.
I also do not see them being the kind of sites to comply with something like this.
Streaming is cancer, block all streaming sites, especially Netflix.
Don't see what's wrong with streaming per se. Of course, this is assuming you can cache it if you want to watch it multiple times – which you can't if you have certain kinds of DRM.