Not entirely sure what you're asking, here...
But I'll take a stab at answering what I think you're asking:
Trust doesn't need to enter into the equation, except as a matter of reputation. Until the Bitcoin reputation system is more robust, this thread will have to suffice. I don't need access to your files, I don't need identifying information, and I don't need meet you in person or even talk to you on the phone. You ask me a question, in whatever means you feel secure in: email, PM, IM, etc, and if the answer I give resolves the problem, throw some bitcoins at the address below. If you think I was really helpful or just want to make extra sure that I keep doing this, throw more. Then, post a response to this thread with a review, letting the world know how well (or shittily) I answered your question.
Is that what you wanted to know?