A quick search on the internet reveals many sources to receive basic firearms safety and handgun specific training. As these people reveal themselves we should tactfully point them towards these basic courses.
Even scarier... "Mr. Dude" who was sweeping the room with his wife's loaded .380 had recently attended just such a class with the same CCW instructor.
You buy 'em books, send 'em to school, and they just eat the book covers...