Jack Vale is known for playing pranks with a social spin. More than just pranks, some are social experiments that demonstrate how assuming, dumb, paranoid, or all of the above people can be. An example is the 'Paranoid Name Dropping' prank, where Jack goes around the 2014 NAMM show and pretends to be on the phone with someone.
He checks out the name tags of random people he passes and then calls their names out while appearing to be on the phone. Most people are puzzled, some look alarmed, but I say they're all just incredibly dumb. You're all wearing name tags, people! Check it out and have a few laughs at their expense, why don't you?