You don't have to go that far, often times the comments can be helpful and insightful. I use Youtube Comment Snob[1] to weed out the most likely low-quality comments based on text patterns like lots of !!! and ??? in them, or lack of capitalization at the beginning of a sentence, excessive fucking profanity, COMMENTS IN ALL CAPS, and other customizables. Check it out, there exist addons for both Firefox and Chromium.
edit: I forgot to link the more general Comment Snob[2], also by the talented Chris Finke which is the same idea but for the general web as well as Youtube. Amongst the sites it features by default are HN and Reddit. It's really easy to write new site rules to add to it with the example he provides in the link. Only for Chromium though.
edit: I forgot to link the more general Comment Snob[2], also by the talented Chris Finke which is the same idea but for the general web as well as Youtube. Amongst the sites it features by default are HN and Reddit. It's really easy to write new site rules to add to it with the example he provides in the link. Only for Chromium though.
[1] http://www.chrisfinke.com/addons/youtube-comment-snob/
[2] http://www.chrisfinke.com/comment-snob/