This guy is awesome. Back in undergrad, I started an online boutique for hard to find shoes and he let me reproduce some of his content on my site. At the time, I thought it would help with SEO.
It doesn't need it, it stores the User Agent beside the unique fingerprint to tell people with the same fingerprint what browsers they (probably) have.
If it really doesn't work without UA, then it's just the website not expecting someone to have disabled it.
I'm so happy to see action from those outside of those immediately affected. There's clearly a problem in the U.S. and whats worse is that the general public doesn't believe a problem exists due to the fact that president happens to be black. Problems can be hard to solve but its nearly impossible when people don't see it to begin with. They way this particular event happened is sad but I personally hope this opens up a much larger discussion and one that doesn't die down.