Probably comes down to HR and Corp security not taking the chance. Obviously, if you had malicious intent, you would have ample opportunity to act before givin

Probably comes down to HR and Corp security not taking the chance. Obviously, if you had malicious intent, you would have ample opportunity to act before giving notice. They just want to make sure they did what they could in case you should in fact have malicious intent. 'Oh, we escorted him off the premises within the hour; this one is not on us...'