I've found really interesting ways that this manifests itself.
I'm a film-camera lover. Well, my Fuji GW690 mk3 is fantastic, except that when I trip the shutter, there's an awful "ping" sound that it makes. I read forum after forum and watched youtube videos that all said the same thing: "Remove the counter assembly and it will remove the ping."
Getting a hair up my derrier, I decided to do this and found, after much work, that the ping sound was in the shutter assembly and could not be mitigated.
Check the work here. http://www.rangefinderforum.com/forums/showthread.php?t=1447...
Anyway, just one internet myth amongst millions I'm sure. I was just so surprised that people would parrot other peoples lies like that. If that's the case with something so minor, I can only imagine the amount of misinformation out there (where people have something to gain).