Jimmy_D said:without proper training a lot of people can become overwhelmed with the "happy switch" and higher chances of wrong doing will be the probable outcome.
History indicates that the odds are negligible.
We trust people with cars, which are far more complex to operate safely, and result in far more deaths and injuries. People will happily stand by the side of the road while complete strangers, who could be distracted, half-blind, drunk, incompetent, suicidal, or driving vehicles that have seen no maintenance since they left the factory, and not think one whit about the potential hazard yet completely freak at the sight of a firearm or the thought that their neighbour might own one.
It costs less than ten dollars per year for five million dollars worth of liability insurance for all legal firearms-related activities, yet insurance companies (professional risk-assessors) still make healthy profits. How much coverage can one get for one's car for ten bucks...?