Not completely related to this thread, but it brought up a memory...
A few years ago I was flying in East Texas and caught a conversation between a student on a solo xc, and his instructor, who he'd heard on the freq in another airplane. Student was planning on landing at xxx airport, which I had just flown over and knew it was X'd out with a huge gash in the paved runway about 1/2 way down, and a lot of large earth moving equipment. Student proceeds to land, then gets back on the freq, and for the whole CTAF world to hear, asks what the big yellow x's mean, and can he take off again on half a runway?
There was the longest silence in the world, and then his CFI tells him to stay put and they'll talk on the phone in a bit.