Information Wants To Be Public
A twisted version of Information Wants To Be Free. It's going to spread, just when you don't expect it to.
So don't write something you're not ready to "own". Don't insult 3rd parties. This practice may also improve the Congruence of your writing, and reduce Isism, since it forces greater attention than snarky asides.
But how can you realistically maintain a real "voice" (or have fun)? We don't all aspire to be Rage Boy.