Guns + planes = bad
Published by Jeff, January 2nd, 2004 in World newsOld story, but the latest development seems to be that the British pilot’s union has some sort of agreement with one airline.
I’d say the union is right on this one. Why would you want an armed guard on a plane? Why not just a sky marshal with a tazer or something similar. Guns seem like a recipe for disaster.

Especially in such an enclosed area where a stray shot could richochet or cause decompression.
explosive decompression (from a bullet hole) is a crock. Even the biggest handgun will have a hole of 0.2 square inches.
Cargo doors flying off from overaged airframes is an entirely different matter.
I read an interesting discussion where instead of air marshalls (who could be overpowered etc), you issue every person who boards with a single shot .22 calibre pistol.
6 people want the plane to crash, a couple hundred want it to land safely.