MainzMan: Anyone who accidentally buys something [...]
Please excuse me for cutting it off:
Why should anybody be bothered to be brought into such situation against his will and have to struggle to return to his prevoius, desired state?
It's like the story of the old lady who gets a hand by an eager boy scout ("do a good deed every day"). He helps her over the street, struggling with her being unhandy and muttering "no, no, no". Then, on the opposite side, she eventually says, "I didn't want to cross the street!"
Why no confirmation screen for a significant purchase?