Your estimate could be extremely high. What those quick with a dismissive comment forget is that 15% of the population has an IQ of 85 or less. So to answer the FAANG-employed Stanford grad's question of "how could anyone be this stupid?": easy, a non-trivial percentage of them are born that way.

Regardless, there are plenty of my Microsoft/Google/FB-employed neighbors that I wouldn't trust around anything more dangerous than what comes out of a USB port, either.