I hail from a formerly communist country and one time during his youth in the 70s my dad hosted a few Americans for a short while. He asked them at one point if they're not worried that communism could get a foothold in the US, to which one of the Americans replied:

"Nah, if it happens we'll just start selling hammer and sickle t-shirts."

Looking how it's currently normalized that every activist of any kind has a book to sell I'm beginning to think that at some point they really started selling those Ts.