Ain't hard, to tell, most open their mouths and make fools of themselves within 30 seconds or more, had one one night when I was in the work dept in buying Muck Arctic Sports so he could go ice fishing (yep the sob pulled up in a BMW SUV) acted like he knew everything, had to Muck website stuff on the boots he wanted memorized, looked down asked what those were, looked like they slipped over your regular shoes, was fascinated at the new invention called over-boots.
Yep, not hard to tell when you see them, they stick out like a sore thumb in my world, might not in others world, never really got to know one well, never seen the need to, really don't see a lot of use in befriending one, might be useful in bear country, shoot em in the knee and run if a bear started after you.
Do know when i see a Prius in our lot, there most likely is one up in jeans buying Levis, they seem to like Levis.
One wanders through my area once in a while, my customers and me are just amazed, they seem nervous, just look around, never seem to have opinions on guns, beef prices, how the corn is doing with the dry weather, if the beans are getting picked yet, which Ian Tyson or Cris LeDoux song is the best, maybe they're shy and don't want to join in, maybe it's the straight black coffee instead of foo foo coffee, but I'd suspect they are just plain dumb about worldly things.
Hell if they do want to buy a hat they never know their hat size.