Overall in terms of what to do vs what not to do in a post, i believe it all comes down to context. There are no laws set in stone generally (except stuff like hate-speech and plagiarism, those will leave one right in the cross hairs of the judicial arms), Apps like Zappl makes it possible to post stuff within 200 characters, and once in a while a satire post ✔ choke 👊👌full 💪of 💯emoji 💩drives home a message better than a wall of text.

I'd say engagement is underrated around here. If one is able to truly communicate with his/her audience, have meaningful exchange, truly provide value, one is way ahead of the game. No amount of follow4follow can trump that.