I  am a night-shift employee at a fairly small gas station and convenience  store in a VERY small town (Less than 500 people small.) This gas station usually plays host to a group of older men in the mornings who like to come play cribbage and drink coffee that the management gives them for free.

One  particular man, who for the rest of the post will be referred to as M,  has never worked for our location, nor any other location in our chain. However, He constantly speaks to myself and the other younger  members of our staff as though he is our supervisor. When he isn't doing  this, he is simply making rude or snide comments about us either  directly to us or to the others in his group.

Simply put, M comes in every day, and after he's done with cribbage, fills our coolers if something is low. He has to go back into what would normally be employee only areas to do this most of the time, and is very nasty to the rest of the staff about it.

With  all the context out of the way, I go in to work one day to find that the general manager had  to come in to cover the morning shift.  We switch tills, and while the GM is  going back to take midday count of her till and our slot machine payout  funds, M comes up to me and tells me, word for word, "Now I went around  and filled up all those coolers, and they'd BETTER look like that when I  come in in the morning."

Frustrated, I  go to the GM and essentially  said that I'm sick of M speaking to me like he's my boss, and that he  shouldn't really be doing anything that he does around here in the first  place, even if it can be helpful sometimes. My boss, likely frustrated  already considering she shouldn't have had to be there that day, told me  that she was thrust into that shift, and that they were swamped in the  morning, so he was just helping her out. I told him what he had said to  me and she told me, quote, "It's not always about you. And sometimes  people on the night shift, not you, but people on the night shift leave  the coolers empty. Ron's just being helpful so you'll just have to learn  to ignore him." I decided not to press further after that, frustrated.

Within this statement,  there's the implication that I, as practically the only night shift  worker we have, do not fill the coolers properly at night. I fill the  coolers to the point where they look full every night before I leave,  but if there are three or more bottle in a row, or the cans/bottles are  large and bulky like Arizona tea cans or tall 38 oz cans, I typically  leave them. I also don't fill the rows completely, because as stated  above, pushing the bottles/cans all the way to the back results in them  falling behind the shelves entirely, or makes the more top heavy bottles  fall over and out of the coolers when they're meant to slide down.

So  Long Story short, I think M should be asked not to return to the store. AITA?