That sucks, I do not like people like that at all. There's a guy I randomly see at my local Walmart who earlier this year walked up to me out of the blue and told me that I might as well give up in this area because he has it on lockdown. I just walked away without saying anything but he hasn't beaten me to a case or bin yet, guess he expected me to just give up that easily. With the most recent bin he walked up just as another collector and I had finished going through it. The look on his face...
The other collector however is a very nice older gentleman, he comes in with a notebook/checklist and buys three of each car for his grandsons and I've helped him sort and find what he needs before. He's just a genuinely nice guy.