Tester's Creed
At work, I do a little testing, and I just wanted to let you schnucking developers know where we testers stand:
Here is the ultimatum of our camp: what can be smashed, must be smashed; whatever survives a blow has value, whatever flies to smithereens is rubbish; in any case, smash right and left, it will and can do no harm.
(Dmitry I. Pisarev)
That Russian nihilist guy most certainly described ad hoc testing!