No to the first, although some of the US based airlines put up decorations in their gates and ticketing counters. One of the TSO's was wearing devil horns... fitting.
OMG a TSO was wearing a devil horn?! Hahahahaha classic. Don't tell me you didn't take a pic!
Seriously, were the TSA officers friendly tho? Did they wish you a Happy Halloween?
Also, did you snag an opportunity to check out how long the lines took, and if the ID checkers were TSA or still private? Also, how many WTMD's were open?