Hi, I'm thinking of giving little "thank you" to people working on Black Thursday/Friday so we can shop for deals. I'm thinking of a chocolate Kiss. Is that weird? Is anyone else doing this?

Not weird at all, I think it's very kind of you to think of something like that, but I don't think most people will eat something that is given to them by a stranger. I just hate to see you waste your money.
ETA: If you could find some little sealed packages (like you hand out at Halloween or something, that might work!

They will appreciate your patience and smiling face much more than a little treat!
One year I took my baby along in a Santa suit... she was about 5 months old and LOVED everybody and everything... it's pretty hard to act like a jerk when there's a cherub in a Santa suit flirting with you...