It's easy to use face recognision on someone that has nothing to hide. That does not make it useful to track someone that does have something to hide. Is it eno

It's easy to use face recognision on someone that has nothing to hide. That does not make it useful to track someone that does have something to hide. Is it enough to put on a mustache and some glases when you walk around a corner to fool the system? A painted face on the t-shirt and a helmet on the head?