Hmmm, so I got kind of invested in this thread after reading the essays and did some digging.
1) I downloaded an autoblocker off a hacking site and tried it out. The one I got is very basic, where you have to manually block in time but it'll automatically go in the right direction. That's almost impossible to detect because it doesn't make you perfect but obviously gives you a massive advantage over normal players.
2) There are loads of users with long NW related posting histories on those hacking forums, so I assume that there are plenty of people well known in this community who use hacks. It's not just random, casual players.
3) From what I can see there's not enough evidence to prove the allegations so MATT remains innocent until proven guilty.
I strongly suspect that there are plenty of people getting 'help' from basic, lightweight hacking tools like the one I tried. They won't make you immortal (and therefore easy to spot) but will massively improve your k/d ratio.