I've always just used my real name online - so instead of having an email address like sexy_asian_chick88@hotmail.com, I just used my name. It's a little less embarrassing when you have to give it to people, and I sort of got over those sorts of email addresses in grade 5.
Sure, that means people can link what I write online, but it's hardly worse than if they just searched for my nickname, and did some legwork. And really, what am I writing online that is so private and secretive that I need to firewall it from my actual identity? I wouldn't be having such discussions on a public forum online - I'd do it offline. If
Now, sure, if I was living under a oppressive regime, and had to get data out - but let's be honest, as a percentage, how many of us HNers fall into this category?
And even then, would you really be doing it on YouTube? YouTube is a bastion of stupid (but funny) cat videos, parody videos, movie trailers and music covers.
I'm fairly sure a whistleblower would be using something a little more appropriate, and where privacy was actually a feature.
And quite frankly, considering the awful quality if YouTube comments, I'd applaud any attempts to make people even slightly accountable for the awful and often hateful c*ap they write on YouTube comments.