Don't know if stupid or serious hmm... -_-
You are a prisonner. On a ship full of guards who don't give 2 shits about your sorry ass.
You are trying to steal. "Steal". In front of guards. "Guards".
The main definiton of a guard is "Someone who watch after things". And you steal something.
It's like saying "Hey, I tried to murder someone with a knife but a policeman stopped me and arrested me, wtf is wrong ?"