Why TSA confiscates bowling pins

Thank God we’re being protected from the imminent airborne threat of rogue bowlers. According to the TSA's bizarre list of forbidden carry-on items, bowling pins fall strictly under the category of 'bludgeoning items.' Every single year, a baffling number of travelers attempt to bring loose bowling pins through airport security, forcing agents to confiscate them as if thwarting a highly specific mafia hit.