"Don't use prop blades as handles...it can do really jumbo-sized harm to a propeller if you use the prop blades as convenient handles for maneuvering the plane on the ground."
--McCauley Textron Co.
"Avoid pulling the airplane around by the prop. Yes, this seems the perfect solution to a vexing problem of how to change the airplane’s position without having to walk around and get the tow bar, but it’s worthwhile to make the extra effort. Neither the engine nor the prop particularly benefit from the loads imposed by horsing the whole airplane around."
--AOPA safety training, sponsored by Hartzell Propeller inc.
"... never push or pull on the prop blades. Forget what anyone has told you about pulling near the hub or the strength of the propeller. Aluminum blades can bend, and it doesn’t take much to put the blades out of track with one another."
--"Propeller Care" by Jeff Simon, A&P, author "The Educated Owner"