Corrected entry: What is the point in the 'tracker' marks that 'They' leave on their victims when they abduct them as a child? The film goes to great lengths to explain how 'They' mark you as a child with these blemishes, and then when these marks come back 'They' come to claim you, but seeing as Billy (the kid who kills himself in the cafe) had actually removed his, and yet 'They' were still able to track him down.
Corrected entry: In the diner when Billy kills himself Julia gets a face full of blood. In the next shot of her face, there is very little blood.
Corrected entry: One of the major characteristics of 'They' is that they disrupt all kinds of things, especially electricity. Now, when Julia is driving along in her car, it shorts out when 'They' are around. All power shuts off, and the headlights power down. Since the power interference is often flickery, I can accept that when she starts the car it will at least try and start, rather than merely clicking uselessly like any car with a dead battery will. However, Julia turns on her four-way hazard lights, which blink properly the entire time the rest of the car is completely dead.