Iconography

If Obama's approval numbers weren't cratering, this would be a lot scarier than it actually is:

I predict that the ubiquitous mockery of the Obama seal will be its undoing. But do we have any historical examples one way or the other? For instance, were the Swastika and Hammer & Sickle every exposed (unsucessfully, I take it) to mockery by the opponents of totalitarianism?