Jeez BigGrecian... you almost seem to take this one personally? Sure this was a tremendous cock-up from their side, and a CFII should know better. But don't come an tell me you've never messed up yourself? Fortunately I have never busted a president's TFR, but sure missed a few NOTAMs one including a runway closure where I was picking up my passengers. Embarrassing to say the least, but none was harmed and I learnt from it.
And oh.. FDC 4/4386 says IF CAPABLE, SHALL MAINTAIN A LISTENING WATCH ON VHF GUARD 121.5. Are you sure they had two radios? Many C152s don't and are used for initial IR training.