My wife picked up her supply of daily aspirin yesterday.  It has a warning on the pharmacist's label 'Contains aspirin'.  We certainly would hope so!

As for dodgems - they've always had a warning not to hit other cars deliberately in my experience.  It's just that everyone ignored it.  I think the original idea was that you drove like the wind, and dodged the other cars.  One trick used to be to turn the wheel as far as you could, so that the car went into reverse.  When I was young the fairground workers id it to impress the girls. 

David