Bang, bang!

Even though, for instance, California requires 400 hours’ training just to become a professional manicurist, most states do not demand nearly such effort to become armed security guards, according to a CNN-Center for Investigative Reporting analysis released in December. 

15 states require no firearms training at all; 
46 ignore mental-health status; 
9 do not check the FBI’s criminal-background database; 
and 27 states fail to ascertain whether an applicant is banned by federal law from even carrying a gun. 

After an ugly incident in Arizona in which a juvenile gun offender was hired as a guard, the state added a box on its form for applicants to “self-report” the federal ban--but still refuses to use the FBI database.

Source: CNN

On the other hand, you really do need some training to trim nails and apply nail polish properly. Whereas we are constantly being informed by the NRA (brought to you by your gun industry) that every child in America needs to be handed a  gun before leaving the delivery room at the hospital.

And yes, I know that Barney was a trained professional. Which apparently is the problem -- so many people out there with guns and badges apparently aren't.