If you put an offensive one, you'll know soon enough! lol
The wrath of khan iymc.
The guidelines are pretty loose. There is a size and dimension limit but they are very generous.
Sexy ladies are fine, if that's what you're thinking. We got some nice Veronika Zemanova's and Jessica Alba's knocking about the place somewhere. Obviously, pornographic images are a no no.
Also anything violent like someone's finger nail being pierced by a bit of iron will be frowned upon. lol