No, but I've seen pillow stealers, although not taken off the aircraft. Ex-HNL on CO when every seat had a pillow when we boarded, except my wifes. Well, not really thinking, she grabbed the pillow on the seat behind hers(we both admit this probably wasn't the right thing to do). Well the two twenty something gals behind us were right up the aisle when said theivery took place. Later in boarding when a FA walked by, the gal behind us told the FA that she didn't have a pillow.. FA said that all the seats should have had a pillow and then they pointed to my wife, who then responded that she did not have a pillow in her seat and did take the pillow behind her. FA got her a pillow. Well, there was some type of stupid security issue on aircraft, some Y pax sat in FC when they boarded, ordered a drink, then either went to his seat in Y or deplaned. So after 45 minutes of trying to figure out who did it, they had everyone deplane but locked us in the gate area while the aircraft was searched. Anyway, as we were deplaning, the 40 something lady who enplaned before us in the aisle seat across from Mrs. Ripper3785 stands up, and a pillow appears from behind her back and another under her butt. Mrs. Ripper3785 was peeved!