The main guidance I give regarding Community Conduct is very simple. Don’t talk about other people.
For example, if someone says something that you know to be flagrantly wrong there are other ways of approaching the topic than to say ‘You are wrong’ or ‘You lack the education or experience to know that you are wrong’.
Try some of these approaches instead:
‘My understanding as a Ph.D and Nobel laureate is …’
‘I haven’t listened to the Quantum Supertunneling Nanocables but if they worked in the way the manufacturer suggests then wouldn’t we have rocket cars by now,’
‘My experience with the ‘Whack-a-Doodle 2000’ is that input A needs to be connected before output B works at all’.
I would make an exception for devices that break the second law of thermodynamics. You can just tell people they’re wrong then.