It's funny just remembered - last time I bought ammo at Walmart, I got something fairly modest like a box of 150 5.56, few boxes of .22 mini mags, and a 100 of 9mm.
Two clerks were at the counter, one a female of obviously an immigrant of some sort, other a male.
The female was going on about "wow what are you gonna shoot with all these bullets?" and I said something like "paper mostly"
.. The guy told her never to ask those sorts of questions, said something about a policy.