60 years ago when I was a wee lad, I remember a news story about a person almost going to jail over a Nazi flag. Some soldier snuck it back from the war. His wife came across it, washed it, and hung it on the clothesline in her back yard between two sheets. The wind blew the sheets to where neighbors could see the flag and they called the police.
Apparently it was against the law to display that flag at the time, at least in that locale if not everywhere.
He might have been better off if he smuggled back an MG-42