If you're talking about forcing YouTube commenters to use Google+, then lol. YouTube comments sucked, but at least they were generally well-threaded suck (when YouTube itself was displaying them properly and not shuffling the comments in its own...special ways).
When I peek at the newly Plus-ified comment sections...oh god. Hashtags. Mere retweets. No cohesive threading at all. No change in the level of anecdotal GIFT proofs (because [a] anonymity is not the true problem and [b] Real Name harassment only keeps good and honest people away). Build a functioning community? Really?
Just run away from Google if you're not already saddled by using your Gmail as an "id" for several dozen services. Even then, look around for other mail providers, get on the starting line, raise your ass, and be ready to sprint.