In NY obstruction of breathing and/or blood flow is a crime. I challenge anyone to grapple without incidentally doing either. I've not sat down in a police training session (I haven't been invited for some reason), but from dealing with clients and watching arrest videos, this is something that is happening. Out in the world of enforcement, there has been wild over-reach. I've had 4 such cases myself in the last two years, the public defender has had several dozen. All of mine were dismissed and I know almost all of the public defenders were likewise, or were reduced. You know a law is bad when despite being a by the elements slam dunk, the judge and prosecutor continually throw them out.
As for the libertarian notion; 'child porn' as generally defined by law includes cartoons. Folks have been in federal lockup for child porn where the offending material has been fictional writing, naked cartoons of the Simpsons in sexual situations, and other no actual children involved offenses. Creepy, but not actually hurting anyone.
Unless the charges actually state or make mention of flesh and blood human beings, my presumption is creepy Japanese imports and nutter butter prosecutors. Nutter Butter Prosecutors being a term of art
As for the distinction between viewing and creation/dissemination/encouragement; I do find it offensive to lock someone away for 10 years because they saw something. Show me active participation or support/dissemination. The idea you can be locked away for less time for actually raping someone than you can for having clicked on video link from a skeezy website seems absurd and offensive to me. If anyone feels otherwise, please do explain as I don't understand the worldview from any generally accepted system of ethics.
And no, I am not doing your research for you. There are plenty of books out there on federal over-criminalization and abusive prosecution. CATO and other gov watchdogs even has presentations on the topic. I think it was at a federalist society event where I heard about the Simpsons Case and other 'child porn' disasters from directly involved attorneys. Tales of Gov. abuse and intimidation. I was interning with the Dept. of Justice at the time and had trouble imagining any office with so much free time or with such a perverse sense of priorities. But hey, it makes for great news items; especially when the general public has no idea what 'child porn' means in the legal sense.
I will continue offering up my rants and general opinions. If I had the free time to make scholarly articles, I'd have a blog.
Go read your article again cass; it actually talks about the choke hold still being in use; just discouraged and banned outright as an instruction.
And no, I do not support child pornography. But I will defend people's rights to make and view haikus, short stories, and offensive cartoons ect; even if the gov. decides to slap some extreme labels on them.