I've met this type before. It was around 3 yrs ago in a popular learning spot In Sydney.
I made the mistake if asking a guy for a launch just when he was connecting his pigtails. Of course common sense and being polite with the words "when your ready mate" you would expect a sure give me a sec. Nope I was met with a "Yea I'll finish rigging my f@rking kite"
Oh alright then.....waited all of 20 seconds and he finishes rigging then walks over to my kite. Done this routine loads of times before so I'm relaxed in the right position to the wind and ready for my launch. He picks kite up and holds it right at the wing tip not in the middle!! He watches me struggle as I fight to even the lines with him now pulling against me then before Ive given the thumbs up he tosses the kite down wind sending it rolling over people.
RPM do yourself a favour and someone elses; make a point to help (correctly) launch someone in the new year!