First class brainwashing: stand up all the recruits in a line; instructor gets in your face and screams at you for a couple of minutes.
One of my sisters attended a class loooooong ago, and she ran like heck out of there.
Plus, the rotten little Scientology solicitors are positively nasty when rebuffed. They were all over Florida when I lived there.
Offer to tell them what's on OTIII...