I think it is a very good idea. I don't know how I have managed to survive this long without ever having scalded myself in a bath or shower that was too hot. Clearly I have been putting my life into my hands every time I have run a hot tap
Perhaps we should pass a new law requiring aspiring politicians to go through a series of tests to prove they have some common sense before they are allowed to run for office. Those who fail the tests are promptly executed.