- Don't snitch-tag.
- Don't explain to people what they just said.
- Don't "correct" people's jokes.
- Don't respond seriously to silly little posts.
- Don't respond trivially to obviously serious posts.
- Don't "jocularly insult" people you don't know.
The rest is commentary.
People should have to pass a social media etiquette class before they’re allowed to purchase a smart phone.