Ugh, this is such a web1.0 problem. Instead, why not write a greasemonkey plugin that cross-submits posts to Academic Hacker News when you upvote them, and only upvote academic articles?
Every social news site has it's unspoken core values that can't be parsed out (easily :) with a script. HN has it's libertarians, reddit has it's contrarian only-I-took-the-red-pill mentality, and 4chan has its poop and kiddieporn. Go against the respective grain, and get ostracized.