It's not just in-universe that a smelly prank was pulled. Steve Carell secretly threw a stink bomb into Michael's office just prior to filming in order to elicit genuine disgust responses from his co-stars.
Dwight is calling Rock 107 asking if he's the 107th caller for a CD box set. Rock 107 (106.9, WEZX) is the area's classic rock station. They frequently have contests where the 107th caller wins various things.
The no smoking sign in the break room depicts section 6404.5. That law doesn't exist in Pennsylvania where the series is set, but it is the workplace smoking law in LA where the show is filmed
Early in the episode, Michael admits to being a fan of Joe Rogan. Coincidentally, Rogan was raised in the same part of Massachusetts (Newton, MA) as both B.J. Novak and John Krasinski. Steve Carell, incidentally, is from nearby Acton.