LUCIFER,
To get control of the guns, they have to already have control (IE killed) the pilots. At that point, 2 guns don't matter, the terrorists have a weapon of mass destruction. How hard is that to figure out? If the pilots lost controll of the aircraft 2 guns don't matter, but if the two guns help the pilots keep controll of the aircraft, they have saved the lives of everyone on the aircraft and thousands more on the ground.
Futhermore, I know of many people that were carrying guns in the cockpit right up till the mid 80s when they were required to go through security like everyone else. That exemption that the airlines didn't apply for was irrelevant till the mid 80s.
As to pilots coming to blows which someone somewhere else mentioned, that was something that was MORE common in the days before CRM. Columbine is a non player. We aren't talking about children here either...
Cheers
Wino