Sure. Except for the fact that there's no trap door in Minecraft at all, and the fact that you can just place blocks under yourself and get out of there, this plans seems totally do-able. trapdoor = sand+red dust torches and tnt in the middle. Make the bottom unbuild-able or restricted like spawn.
Built a trap clavus, make a giant obsidian cage and when the thief wants to look into the chest, bam, trapdoor opens and he is stuck till someone finds him.
I liked it so far, and I'm glad they got rid of the stupid menu now you don't have quick switch all the time. At this moment I really love the kicking cars into peoples face etc
me just hanging around with <insert girl name here>(NOTTE QUOTE). It's such a simple dream but it does a lot to the mind I must say. OH AND world domination with my friends, also a pretty awesome dream