"But then he used to fart in elevators before sending it back down and various other 'pranks'."
My little brother did something similar prank to me... we were in a crowded elevator at a very nice hotel near Disney Land in California. he ripped the loudest fart I have ever heard. then looked directly in the eye as he exclaimed out loud "what's wrong with you.. why could you not wait until we got out of the elevator" blaming the fart on me. que everyone looking at me with disgust and everyone getting off at the next floor. I didn't think it was very funny then, 25 years latter I look back on it a laugh. it was a pretty good prank.
In the case of the poo-jogger, if it had been once or even twice as a prank, I could laugh it off, but 30 times... that's the sign of a disturbed individual.