because no one said OPSEC had to be boring!
Always be careful of what you say and where you say it- you never know who's listening and what they might think!
Scene from home alone. How much work did these burglars have to do to find the vacation schedules for the whole street?
Sometimes, what seems to be an indicator can be innacurate. Remember to double-check your assumptions before acting!
Did they classify the wrong information, or did he just say too much? Whatever the case, make sure that your users understand what is classified and why that's important.