I think I use stickers a bit differently. I use lunacy for when the poster's situation that they're describing is insane, not their opinion. Same with horrifying and etc. The news article on the Russian woman getting turned into mincemeat definitely deserved a horrifying sticker.
I don't mind the insanity or unpopular opinions as long as it's relevant to the thread's topic. In the end of the day, this is a website to laugh at dumb people on the internet. The politics should stay in the off topic section of the site.