Oops! My defective memory again. Certainly not a pracrtical idea unless you have a very large crowd on hand or lots of time.

One more comment about peeing on your headgear. It is a bit distasteful, but effective. Even better is simply having a full brim hat, basically something along the lines of a boonie hat. Those have worked quite well or me and when moistened with water, not urine, are really nice.