Last summer I picked up lots of pallets from behind the Harbor Freight store. One day, some guy comes running out and asks me what I am doing. I told him that I was loading up pallets and that I had already talked to the manager. Well, who did you talk to was what the guy wanted to know. So, I gave him the manager's name and he had no idea who that was. I asked him how he could not know the name of his own manager at Harbor Freight.
Turns out, those pallets behind the Harbor Freight store were from a Dunham's Sports Goods store, not Harbor Freight. The guy informed me that they have to send their pallets back to the warehouse as returns, and that I cannot just take them. OK, fine, we both understood that there was a miscommunication on this issue, and he let me keep the pallets I had already loaded into the trailer.
But I did ask him, why they put those pallets outside right next to the garbage bins. Every place that I have lived would treat that as garbage and if a person was to take from the pile, there would be nothing wrong with that. Well, he said, the store did not have any place to stage the return pallets, so they put them outside by the garbage bins. As far as I was concerned, that store wanted it both ways. They were not willing to pay for a secure staging area for their return pallets but expected people not to take them if they left the pallets outside next to the garbage bins.
By then, I already had stacks full of pallets at home and it was not a big deal for me. But I do make it a point to talk to the store manager of any place before I pick up pallets from them. Some places are more than happy to give them away, but some places don't.
FWIW, I later found out that anything staged outside by the garbage bins was considered garbage as far as the Mall was concerned. I also found out that the Mall doesn't have any security cameras overlooking the garbage bins. If I want to be sneaky, I could go there on a day that the store was closed and load up and nobody would ever know. But it's not worth it to me, even if I was in the right. Like I said, I now have 5 different sites I check for free pallets, and I don't need the aggravation of picking up pallets where they will get upset.
Also, if the store returns their pallets for exchange, then at least I know the pallets are not ending up in a landfill somewhere. Good for them in that respect.
I do agree with you that Malls can be an excellent place to get free pallets. It does not hurt to look and see what's available.