It’s literally just “be nice to people when visiting other instances, don’t behave like a dirtbag leftist unless you’re actually on Hexbear”. Because the culture of Hexbear is… Dirtbag left. Making sure that the userbase doesn’t behave that way off Hexbear is pretty important. Hexbear users are lovely most of the time but get vicious with each other and are prone to extremely hostile fighting over topics they disagree on, this would be a massive shock to most normal people off-Hexbear. They’re just trying to mitigate that.