This won't prevent you from being manipulated by vanity metrics. All of the metrics have already been crunched -- the 20 posts at the top of /r/all are there be

This won't prevent you from being manipulated by vanity metrics. All of the metrics have already been crunched -- the 20 posts at the top of /r/all are there because they've been validated by everyone else using the site (in the form of likes, activity, and other metrics). Hiding some divs and spans won't change the posts you see at the top of /r/all.