I can't believe that someone would just go through the riders and hand them out to whomever, and not check, especially if a condition wasn't met, the whole contract would be forfeited. If they had a rider stating that the trash cans in the green room had to be changed every 60 minutes, or the contract would be forfeited, would you trust some 16 year old to perform that and not check up on them? "Oh, sorry, Board of Directors, it wasn't my fault the show got cancelled, and couldn't recoup our losses, but Andre forgot to follow the rider......I think he may have been distracted by exams at school."
In fine restaurants, they just don't give the customer's orders to the chefs then forget about them. There is a person on the line who's job is specifically to ensure that the finished product is as expected by the standards set by the guy who owns the place. There is also a FOH person to make sure that the standards of the customer are being met as well (of course, there are conflicts between the line and customer that arise, but those can be worked out)