Nice to know we do get something right in your eyes sometime
I don't think there's any need for any additional guidelines. It all boils down to speaking to people with respect, and thinking about what you post.
No mater what the subject a clumsily worded "positive" view still comes across as positive, a clumsily "worded" negative view more often than not comes across as more negative than it was intended and often that's where the problem lies. I've lost count how many times I've seen posts that say something along the lines of
"I didn't mean my post to read like that let me clarify ..." and the clarification often leads to an interpretation that isn't anywhere near as negative as the original post.
The simple maxim
"think before you submit a post" works so well.