Security on board
So what happens these days if a crazy stands up in flight clutching something that might or might not be a detonator (for example little black box with a big red button and an antenna) and declares that he's stashed a bomb in the hold and is prepared to blow everyone up he doesn't get access to the cockpit and a detour? Would anyone say "Security is ace; I don't believe you"?
You still get proper glasses and wine bottles on board anyway if you're prepared to pay for a premium cabin. I'm not sure if that's every airline but it's certainly true of BA