That sounds like a pretty fantastic way to build an echo chamber.
At worst you lose imaginary internet points if you say something that the group doesn't agree with.
It is something of a collective filter bubble, and there is a pervasive criticism from those who largely don't participate here of typically HN behaviours. I agree with a fair bit of that. There are certainly topics HN doesn't seem to be able to reasonably discuss. (This seems to be a frustration of the mods as well. They're certainly aware of the issue.)
My own (in my view at least) largely contrarian voice seems to have been reasonably well tolerated here, though.