I know one FA who says in the safety briefing that if you don't know how the seatbelt works, you shouldn't be allowed out in public - and then says that if she catches anyone smoking, she'll kill them. The thing is, people actually listen to her announcements. I always tried to sit at the emergency exit for infinite legroom, so I had to know how to open the emergency exit. This FA actually explained how to do it. On most aircraft you're just told to read the card, which noone ever does.