Plenty of different problems going on.
1. "the community policing itself" isn't working on YouTube, and it is failing more and more all over the internet. No offense, but there's a reason there's more and more laws being enacted to control the net. Partly because, you know, Big Evil Corporations and greed and control and all that, but also because self-policing just plain doesn't work in a large and anonymous group. It works very well in smaller communities like this forum. It works like crap-hell in huge and completely anonymous seas like YouTube, Tumblr, Reddit, Digg, 4chan and what else. If "the community" worked, YouTube comments wouldn't be the ocean filled with pig shit that they are.
2. The drive to real life IDs is all across the 'net, and Google is taking a lead because they can. Blizzard tried it to, and was called out for it. Google is being more insideous about it - most people accept using their real name on a Facebook or G+ account. Linking that account to their videos, pictures, and so on seems to make sense and be "convenient" (which I suppose it is), but it's also horrible and bad.
3. More and more, the major corporations are being help responsible for "their" content. Be it youTube/Google, ISPs, and so on - they're being held accountable and being forced to cooperate with law enforcement (and they're playing along by trying to get more say over content and such - a mistake on their part as far as I'm concerned). It makes sense that the more they get held accountable, the more control they want and the more restrictions they'll implement. Google isn't free and never has been - and they haven't been the small sympathetic company fighting the big brands for years. They've mostly just managed to keep a good corporate image. If it was up to Google, I assure you, the only thing we normal people would upload would be America's Funniest Home Videos, and we'd all be tuning in through YT to watch TV. This whole community building thing and such isn't (necessarily) in their own interests.