Sneezing on a check so it's nice and moist and then handing it to you for payment.
Rooting around in their underwear and pulling out damp currency and handing it to you for payment.
I worked with a very juicy clientele. 
Lol. By underwear, do you mean brassiers? I know one woman who wears an apron everywhere because women's clothing has so few meaningful pockets. I finally figured out to put a wristlet on my keychain - it detaches when I drive. That way, I have a pocket for the phone, the grocery list, etc... Right now, it's clear colored, which is even better.
Every time I buy apples I feel like I need to ask the check out clerk to please handle them gently, that they bruise easily. Otherwise they roll then down the counter to the bagger and I get home with a bunch of bruised apples.
It takes me awhile to choose produce, only to have it ruined at checkout. If that happens, if I don't get the sale price or the marked price, or some other bullshit, at some point during the conversation I'm just done.
PS, wash the baskets once in awhile. God only knows what filth lurks there
I guess there really is no more old fashioned bagger training. I don't like rough cashiers, either. Cold foods mixed in with hot, bananas mixed in with cold foods, etc... Dirty baskets, and even in the displays underneath the produce, things look very grungy - appalling. I'm surprised more people don't get sick from that. Sometimes I wipe my basket with the free wipe, but not sure it helps much.
One thing I've been seeing lately is wait in line, put all my things on the counter, and finally get to the register - only to see a handwritten note on the card terminal saying ''no cash back''.
WTF, the main reason I'm in the store is to get cash back. What, now I'm supposed to drive to an ATM, find parking, etc? Isn't the place to put the sign is somewhere it can be easily seen by the customer before getting into that line in the first place?
I hadn't realized that was happening. Can you imagine being disabled & dealing with that. It's bad enough I have to get out of the car just to see the tiny little hours posted on the front door, usually posted in white on a clear background. That's as bad as getting all the way back, to the restroom, only to find out you have to back up and ask for access. Or, detour signs when you could have turned off and taken an alternate route just one block back. Communications were the first thing to go when the economy hit bottom around 2008, & they are only now starting to come back. Workers who were 20 in 2008 worked 11 years at an impressionable age, with poor workplace communications. They accept misinformation as a matter of course.
