You're wrong here as others have noted ... and it has nothing to do with CofC's of the airlines. For example, my aeresol hairspray is permitted either in carry on (small, expensive sizes) or checked without issue. The stuff that is not allowed are the household cleaner and other commercial use aerosol type containers and yes, those have been prohibited for some time.

Given the origin of this couple, it could be that the TSA goons couldn't figure out what the product was so they pulled it whereas either the bag wasn't opened or the products were recognized as personal and therefore allowed at the other stations during the trip. Regardless of the reason, it shouldn't have happened if they were personal products.