Sounds a bit like poor supervision to me. What was the weather like when he set off? Did the instructor who oversaw the flight check the weather? Too many questions!
A student on a QXC landed at an unlicenced airfield at which I kept an aircraft I had a part share in many years ago. He thought it was another airfield some 25 miles away. When informed it wasn't, he asked if we could sign his form anyway. the answer was no as we weren't licenced. He said never mind, he would set off to the planned airfield anyway. We said no he couldn't - we weren't licenced. So he phoned his club, whereupon the CFI asked to speak to one of us and subjected us to a long tirade demanding who we thought we were telling his student he couldn't take off again.
We just pointed out that what he was suggesting was illegal and we looked forward to seeing a qualified pilot arriving to fly his aircraft out, or we would fly it back for an appropriate fee!
It was at our airfield for some time, during which it accrued parking fees.
