Busted

מסכת כלה רבתי פרק ט 

לעולם יהא כל אדם בעיניך כליסטים והוי מכבדן כרבן גמליאל. מעשה בר׳ יהושע שהיה אכסניא אצלו בא אדם אחד נתן לו אכילה ושתיה והעלהו לעליה. ונטל סולם מתחתיו מה עשה אדם זה עמד בחצי הלילה פרש טליתו ונטל את הכלים וכרכן בטליתו וביקש לירד ונפל ונשברה מפרקתו לשחרית בא ר׳ יהושע ומצאו א״ל ריקה כך עושין בני אדם שכמותך אמר לא הייתי יודע שנטלת סולם מתחתי א״ל אין אתה יודע שאנו זהירין בך מאמש

Kallah Rabti Perek 9

You should always be suspicious of those around you as if they are bandits. On the other hand, you should nevertheless treat those around you with the utmost respect, as if they are the Nasi Rabban Gamliel himself.

One time, Ribbi Yehoshua hosted a guest in his home. Ribbi Yehoshua provided him graciously with ample food and drink. When nighttime came, he arranged sleeping accommodations for the guest on the second floor of his house. When the guest entered his room, Ribbi Yehoshua removed the ladder used to descend from the upper level and went to sleep.

What did this guy do? at midnight, he gathered up all of the items in his room and wrapped them in his jacket. Then the would-be burglar tried to sneak off. He attempted to descend from his room but the ladder was missing. Instead, he took a tumble.

The next morning, Ribbi Yehoshua found him lying in a heap with a broken spine and a jacket full of stolen goods.

"Jerk! What kind of behavior is this?!" Ribbi Yehoshua asked of him.

"I didn't know the ladder was missing!" Responded the thief, apparently missing the point.

"I'm no idiot. You should have known that I was on to you from the start!" Ribbi Yehoshua informed him. 

Don't try to burgle Ribbi Yehoshua.