- Time zones screw up Conal's plot somewhat. If the final commercial goes off simultaneously, then it'll be midnight on the East Coast, and lots of his targets will be in bed. If it goes off at 9 on each time zone, then someone besides Challis should have managed to make the connection between the commercial and the masks — maybe not by Central Time, but almost certainly by Mountain Time. The ending scene would have taken place long before Challis escapes Cochran's factory. Still, though, Cochran's guaranteed to massacre the children of at least one time zone.
- But the only reason Challis knows exactly what's going on with the masks and the signal is because Cochran's told him. Any parents in other time zones would probably be too frantic and terrified trying to save their children to put two and two together, especially when it comes to something as seemingly innocuous as a television commercial that they've seen about two million times across the past few days. Also, as the 80's Dan episode dealing with the movie suggests - we only see the adverts in one time zone; the others could have been at five, six, seven, or eight dependent upon where they are, and each time zone could have descended into general chaos with no-one thinking or knowing to call other TV stations in other time zones.
- Cochran's whole plan hinges on children all across the country wearing one of three specific types of masks while watching his horror movie marathon. There are far too many variables in this scenario, and each of them seem very unlikely, even on their own:
- Assuming that every kid in America would want to watch tv immediately after trick-or-treating instead of just gorging on candy and/or going to bed.
- Assuming that every kid in America has parents that would allow them to watch R rated horror films.
- Assuming that every kid in America would even want to watch a marathon of horror movies. Yes, kids can handle scary stuff in media better than most people give them credit for, but there are still plenty of kids out there that would be too scared to even try watching a horror movie.
- Assuming that every kid in America would actually buy these masks. As 80's Dan pointed out, a witch, a skull, and a jack-o-lantern are extremely generic, especially with no pre-made costume associated with them. Most kids would far prefer dressing up as their favorite pop-culture figures.
- Assuming that every kid in America wouldn't remove the mask out of eventual discomfort or obstructed vision before the Silver Shamrock jingle started playing.