That seems like a terrible idea. Unless you're hiring for a user facing role, one's personal opinions should have very little bearing on their hireablility. It's a number that literally means nothing. Hell you can get down voted for having perfectly logical contrary opinions (e.g. any thread involving politics, diversity or Microsoft). This is something you do if you're just are looking for people who think exactly the way you do.
Personally I refuse to provide any company with material that can link back to my personal social sites. It's simply not worth it. I'm not going to sanitize my digital life for the purposes of getting hired. I don't even provide links to my github because people read too much into what is or isn't there trying to parse out some signal that doesn't actually exist.
My posting voice on HN is very different than my professional voice, and I don't want the two spheres connected at all.
(Similarly I don't want my reddit or tumblr accounts connected with my professional space, but I do want my github and linkedin accounts connected with my professional space, and I try to keep my facebook account generally respectable; these days it's mostly shares of 'Old Friends Senior Dog Sanctuary' pictures and if any employer doesn't like that they I don't want to work for them).
It's not though. If you're not arguing a pro-groupthink position you'll get down voted regardless of the quality of your commentary. See just about any politics related thread for an example of that.
Note that only applies to subjective topics. If you're commenting about a purely technical topic then the voting system does seem to work more effectively.
Personally I refuse to provide any company with material that can link back to my personal social sites. It's simply not worth it. I'm not going to sanitize my digital life for the purposes of getting hired. I don't even provide links to my github because people read too much into what is or isn't there trying to parse out some signal that doesn't actually exist.