Though Halloween can be a time for elaborate costumes and extravagant makeup, sometimes a subtler way of expressing the spirit of the season is in order. Whether a spider-web-themed bracelet, a watch decorated with skulls, or a writing instrument that pays tribute to slasher-film icon Jason, the right spooky accessory can indulge your penchant for the provocative while still maintaining a dignified sense of style. Possessed by the Halloween spirit, RobbReport.com has compiled a selection of ghastly adornments, fro…