What I would do @Adnan, is create a simple landing page with a PayPal "Buy Now" button with a drop down menu where you can choose a quantity from 1 to 20.
You then explain on the page that most questions people ask you are already answered in the forums and include a link to the forum search. However, if they REALLY want to hear it from you directly you will answer any MP or marketing related question for $20 per question.
So all they have to do is choose the number of questions they are not willing to look up themselves and instead have you answer for them, pay $20 each, and go to checkout.
Whenever you get a PM asking silly questions you simply reply with the link to your landing page.
Everyone is happy and those that want to be spoon-fed can be.