A common mistake that people make when trying to design something completely foolproof is to underestimate the ingenuity of complete fools.
He was a dreamer, a thinker, a speculative philosopher... or, as his wife would have it, an idiot.
If it looks like a duck, and quacks like a duck, we have at least to consider the possibility that we have a small aquatic bird of the family anatidae on our hands.
To give real service you must add something which cannot be bought or measured with money, and that is sincerity and integrity.