* No oneliners. Specialy memelike oneliners.

For example, if someone says "moon" and you reply "That's no moon...it's a space station." you will get downvoted.

One clear symptom is that someone else wrote the same comment (with allcaps, that breaks another rule). I'm not sure why that comment was not downvoted. (Note: I didn't downvote your comments or the comment of the other user.)

You can write oneliners in special occasions, but it's much safer to write a longer comment and give more details.

Another rule is:

* Don't complain about downvotes.

Luckily, your second comment didn't get downvote.