For a long time, Germany treated any mention of nazis or depictions of swastikas as basically infohazards, scp style. You can’t become the fascist if you don’t know what a fascist is, or so the thinking went. Imo a lot of what was really happening was German guilt and attempting to hide history from their youth.
Kid I knew 25 years ago had one. Actually kinda worked on an indoor pool, which was neat, but definitely didn’t work for shit on the sidewalk. Basically, it didn’t work at all in any sort of wind and barely worked on anything rougher than linoleum