Getting a weapon aboard is an offence, as is carrying a concealed weapon, regardless of intent, and being a Journo should make no difference.
The mere fact that journalists are endangering aircraft and passengers in order to show the world how they got weapons aboard, including those with more sinister motives, and cause public hysteria about further terror attempts should, in my opinion, be treated as conspiracy and colusion with terrorism - after all, they are effectively carrying out the security recon for terrorists, which is the highest risk part of an operation.
By the way, the comment about bar carts penetrating the door is, I think, a joke refering to when an unsecured rear galley cart damaged the door on one of the new 73's at EZY on landing after an empty positioning flight. The door needed a fair bit of Isopon, but it didn't breach. Furthermore, it was the original standard door, not the reinforced type.