I am sure I could have flags of defunct nations that would get the mods to ban them. Flags do represent a political idea, if not, then any national flag should be fair game.
I would have to agree with Crothian. Flags by their very nature represent a political entity. When you display one, you are saying you support what that flag represents, therefore it should not be allowed on a non-political site such as ENWorld. IMO
Current issue is bards, the steampunk is next. And not everything in it is on the theme so don't worry about it. :D
Deities eh? I made about 80 so far for my Taratikan setting.