I don't see providing information to a dominant as wrong if its done in an appropriate manner under and under the correct circumstances (as Oz mentioned above.)
My Owner is very fond in fact of saying that his best teachers in the arts of holding wise dominion have allways been the very slaves who laid at his feet.
To me complaigning that ones submissive or slave is "topping from the bottom" or "bratty" or too much to handle or any other such contrivance is just a winney way of showing ones own insecurity and proving that one isnt as dominant as they first thought.
Be very careful if you go looking for a mentor in real life. Involving others in your relationship isnt somthing to be entered into litely by any means.
If your allready pretty knowledgable in bdsm I advise you get him a membership here (as an info scource only deffinetly not to find some online personality to teach him) and or go get some books you have liked on bdsm and have lots of open honest comunication!
Besides you can never really know someone from online alone anyway. Real trust takes time to develope and requires real deeds to base it upon.
If your not so knowledgable, well then, I recomend you both travel "together" on your journey and learn "together" what works for both of you and use a lot of common sence and keep things SAFE, SANE and mutually CONSENSUAL first and KINKY second.