Worst comes to worst they can still wave the flag of AES countries, at that point banning even those would start to have its consequences. It's a losing battle by the bourgeois state, because socialism isn't tied to specific symbols and flag waving, we can adapt.
They can ban anything they want. The cops and judges enforcing the law instinctively knows who to target and who to ignore.
Worst comes to worst they can still wave the flag of AES countries, at that point banning even those would start to have its consequences. It's a losing battle by the bourgeois state, because socialism isn't tied to specific symbols and flag waving, we can adapt.