Heh! I once saw a grouping from a US Berlin Airlift navigator that had been pasted onto a section of the Berlin Wall in the mid 90's (done by one of his grandkids...my oh my).
It's become tougher to tell people that do that intentionally and those that just don't know any better (ie antique/junk store owner that is not familiar with ODM...or at least have a guidebook)