One one hand, this is reasonable, on the other, it just draws attention to how stupid it all is.
It is reasonable because the laws and regulations for commercially-available streaming media should accord with the laws and regulations for commercially-available physical media.
Unfortunately, the laws and regulations in question are utterly ridiculous.
I can kind of see the 'strangulation' part but let's not forget that this is a recreational activity - something people do for (in lieu of a better word) fun. It is, however, an activity that could result in death if it is not done correctly (if you REALLY messed it up).
But then there are numerous recreational activities that can result in death and serious injury if not done properly and many of these are not just available on DVDs and streamed via the Internet - they are broadcast on free-to-air television. Any time you see people jumping motorbikes over things or throwing themselves out of planes any number of things. Some have a far smaller margin for error.
Some of these depictions come with warnings not to try at home but if that's the concern then why not add these warnings to the start of pornography containing the 'dangerous' acts?
Oh, and keep your noses out of everyone's private lives.
Biting the hand that feeds IT
