Yeah, you might hide somebody else’s hair, I also don’t think that it would be a hard thing to do, however, don’t they walk up to you, pull one hair out by the root directly from your hair and are putting it in a little plastic case? I honestly think that it would be a really hard thing to convince them to take those few hairs that you are having in your hand because I don’t think that they are so stupid. It might be your hair, but I do think that they might very well realize that it might not be yours.
Regarding the fact if there’s a bald person that has no hair then they are getting a pubic hair so that wouldn’t save you. however, in case you are going to shave absolutely all of your hair from your body then I am quite sure that they are going to assume that you are having something serious to hide so they are not going to test (of course, since they won’t be able) but there would surely be consequences as well, that is why I would not recommend OP to do that either. I am not quite sure what you can do about it… maybe you could become a bleach blonde to strop the hair of chemicals and then to color it back to its natural shade? I am not sure if this would work, but that’s, at least an idea… and yeah… I do know that this is pretty damaging on your hair, however in case bleaching works (again, I am not sure if it does work or not, but it is an idea) and the job that you’re trying to accomplish is important enough, then I surely think that it is worth it (or especially taking in consideration that you’re trying to stay out of jail, that’s important enough isn’t it?)
I guess I can see it now… they are telling you that it is a hair follicle test so you are doing all the right things so that your hair is being “lean” and then they are taking blood or urine… oops… IMO that’s a real screw in there. I guess.