In spades!
Back ~20 yrs ago when I attended my first Big E gun show in a very long time, I was taken aback by seeing many tables selling tiny glassine envelopes (the only thing I could think of was that they were cutting drugs for sale), tons of fake LE badges (boxes and boxes of them) and other junk.
There was a few legit dealers of WWII memorabilia selling Nazi stuff and I remember talking with some to get an idea of the value of some stuff my late Father liberated at the end of the War (no, I never will sell any of it).
The fake stuff I have no use for but if someone is a legitimate collector and needs to fill a blank space in a collection, I can understand if they buy a fake to fill the space until such time as they are able to land the real thing.
I have no use for the Neo-Nazis, but as someone who believes in the entire Constitution I respect their right to free speech as well.