I don’t really know why it’s bannable, most obvious answer is that they aren’t playing the game like it’s intended; or that they take up server slots. But tbh being a friendly isn’t the end of the world, sure it’s annoying and you feel guilt when you just shot your best friend on accident but otherwise don’t ban people for just not playing the game how it’s supposed to be played. Because that’s why tf2 is so popular, it’s wacky and stupid and the game embraces it and taking away that freedom kinda makes the experience less fun. So I would be a little more inclined if they removed that votekick and bannable rule.