Absolutely no politics involved. -- It shouldn't be an issue but it's better to state it plainly. Should be rule 1. Instabanable and permabanable. I HATE politics. I'm not the only one. Politics only brings arguments and threats.
No people selling sex, or pictures of sex, or sex acts. No looking for hookups. -- Is a discussion area not a hey wanna pay to play or pay to watch/see. People trying this end up spamming communities with the same crap over and over. If you are searching for a playmate go elsewhere. These are together because the majority of the hookup posts I've seen elsewhere end up being pay to play. Discussion about paying should be heavily limited because that will invite the vultures of "I'm available" to come in.
No illegal acts. -- This is not limited to but should include children. I am a survivor of childhood sexual abuse, if you think it's OK come visit me personally I will introduce you to a friend of mine. Again it shouldn't need to be a rule in a civilized world but there are people who will try at some point. I'm pretty sure that is a basic Lemmy rule but should be clearly stated community rule.
Lemmy is growing and will continue to do so which will bring more junk and issues.