With children you should remember that losing a toy or, in this case, a cap, can be one of the most upsetting things the child has experienced in their life so far.
He's probably got a list of people he pissed off that's as long as a CVS receipt.
Madness string 95141
And Readers, on this coming Mother's Day, if your mother thinks you're beautiful just the way you are, and your mother-in-law is not trying to kill you, happily lift a glass of (unpoisoned) champagne and celebrate the women in your life.