It happens - I had a similar experience recently when doing circuits at Goodwood. Some pillock gave the AFIS a bashing because they wouldn't
clear him for take off - they can't, of course - and then did a sharp right hand turn after take off and cut straight in front of me when I was downwind.
Not quite as bad as the chap who kept trying to land on 28 when 32 was the active runway. After a couple of attempts AFIS asked him if he had enough fuel to go back where he came from. Affirm came the reply, after which it was "suggested" that he might return there.... <img src="smile.gif" border="0">