Normal indications of zombidom (pale unhealthy skin, glassy eyes, torn or ragged clothing, lack of physical coordination, incoherent or garbled speech, or a tendency to gather into groups and shuffle about en-masse groaning incoherently) are unfortunately also commonly found in the normal teenage population (especially boys). Also the absence of any kind of school bag, any writing or note taking implements, or even occasional articles of clothing should not be taken as evidence of zombidom (unless presented alongside other symptoms such as the general lack or responsiveness, the foul odour of rotting flesh, or the gobbets of raw meat between the teeth).

There have been reports from some researchers into the behaviour of the walking dead (zomboligists) which indicate that there may be a variety of zombie which retains some pre-zombification skills. Primary amongst these is a primitive attempt at camouflage. As mentioned elsewhere, zombie teachers may retain some of their native cunning and try to carry books in an attempt to lull the suspicions of their prey. Similarly, zombified students may attempt to blend in with other students. Like zombie teachers, these students may attempt to carry books, little realising that this is a behaviour mode looked upon with great suspicion by real students. They may also hold cell-phones, but seem to lack the basic concepts of cell-phone function or operation and resort to pointing them at other students and making guttural zappy noises, or in some cases chewing on the outer casing. Some zombie students (of either sex) may attempt to apply lipstick or other make-up products, but because of the coordination problems which afflict even these more cunning zombies (even the newly undead lack basic coordination), they generally produce an extremely distinctive style of make-up (ie smeared all over the face style) and, as with cell-phones, may absentmindedly insert the lipstick, eye-liner, foundation packs, etcetera, into their mouths (or in some cases, ears), which produces a very distinctive and alarmingly colourful type of drool (or ear wax). Ultimately these ‘camouflage zombies’ often end up being considerably more noticeable than the simple un-camouflaged zombies which simply lurch, groan, and wander mindlessly around the school (pretty much like real students – especially in the hours before lunch). In short, the only people who tend to get caught by the camouflage zombies are the ones who succumb to uncontrollable laughter, fail to run away properly, and then literally die laughing (well, actually they die a little bit after they stop laughing and start screaming, but you get the point – never laugh at a walking make-up disaster zone).