When I went to school with Chelsea, we used to be able to spot the SS guys because they were the only guys in B&G outfits where there was no dirt anywhere on their uniforms. (Well, and the earpieces, but those were less obvious from a distance.)

It took them about a year to figure out that they needed to blend in a bit more - we all knew who they were, of course, but nobody except the High School principal wore a suit to work before Chelsea came. And suddenly there were these skulking guys in suits. It's no good trying to be an inconspicuous guardian when one is the object of constant suppressed hilarity.

Random trivia - at least three of the guys on the Secret Service really really like tunafish sandwiches - their office room -always- smelled of tunafish sandwiches.