This feature will lead to me deleting my Youtube account entirely. I do NOT want my archived comments being searchable/viewable. I even went and deleted my comments on the videos where I had left them, and they were STILL showing up in the @username comment search feed! Just WRONG!

And another thing: if you block a user, why can they still respond to you on video comments?

If this (comment search feature) is not fixed immediately I'm deleting my account which will lead to less time on Youtube, which will lead to less ad revenue if enough people follow.