I really don't give a damn about violence ( or nudity) personally. Is the banner violent? I wouldn't say so. Scary, but violent?
And what about Christmas images, are they offending non christians? Halloween doesn't mean anything to me, and didn't mean anything here in France until it meant lots of money for supermarkets and sweets manufacturers. As you said Pnina, 100% mercantile. And your Jewish tradition is a lot nicer!
That said, if this banner does violate the TOS admins never cease to pressure on us, then it should be removed.
But I really don't mind it.