Is the thief too powerful or are we playing wrong?

[hshepley]

We recently played a game where a person became a thief and proceeded to steal every single item on the table from everybody. Obviously she went to level 1 actually 2 because she was a cyborg which meant we couldn't even kill her to remove the thief card. This probably took over 30 minutes as she continued to discard items that she just stole until nobody had anything left. Plus since she was the lowest level all discards went to her. Are we playing this right?