Ha, not forum rules, just aesthetic guidelines. Some are more picky than others, but I consider it at least a bare minimum to show off the side of the bike that has all the bits on it. Otherwise, it's like watching last night's season premiere of Justified -- naked women flouncing around and you only get to see butts! (I have to confess though, the butts (and the butt-side of your bike) still look pretty good...)