I know what you mean, but it isn't only wih firearms. I'm only 23 and went to college for Criminal justice/Law enforcement, and the sad fact is we still have no real life experience, to an older and more closed minded individual a 20 year old trying to buy a gun is automatically stereotyped as hotheaded and prone to violence. And someone please correct me if I am wrong but isn't it against federal law to sell a handgun to someone unde 21 unless obtained from a parent or guardian? I had this same issue when I was 19.