People who use requests for help as power games

I really despise non-consensual power games.  One of the things that irks me in particular is when a person asks someone more experienced in a topic for help and guidance, and the more knowledgeable person turns the situation into a power game.  They use their experience to belittle and bewilder someone who asked for their help.  I gave some advice to a good friend the other night which will hopefully help them out, after another ostensible ally was giving them the run-around.  In areas in which I have expertise, I don't like seeing my friends considered as marks.