I have also noticed the behavior of frum Yidden at the Monticello Walmart. I think they are on vacation mode. All we can do is work on ourselves, and make sure to do a kiddush Hashem especially in public. If you are on line and have a full shopping cart, let a person who has just a few items go ahead of you. Be polite, walk on the side of the street and not the middle, just because you are in the country doesn’t mean there are no cars that need to go by.
By the way, you can alert the cashier that someone put icecream in the fridge and that there are cards all over the floor. Or pick them up yourself.