Thank you all for your comments.
Let me repeat my intention for sharing this post on an idea. I want to show that we can get our idea evaluated very quickly by many people (not all of them are our friends or supporters). From their comments and 'points', we can evaluate the idea ourselves and make a decision.
We may remember how we make any decision (using what we know or have experienced, by copying a similar situation, by asking experts, friends and 'the public', by logical reasoning and when all else failed we 'toss a coin' ;-)
I was careful to talk about evaluating "idea" (not idea originator) and the result only applies to "the idea" (not other ideas from the same orifinator or not -- this is Galamasutta). I also wanted to be a little vague to hint the possibility of transferring some ideas across to other areas (eg. from engineering to health care). I think we can see that some ideas may be "bad" in one area but "good" in other areas (for example "rice cookers" are good in suburban houses, but bad in -no electricity- rural huts and wheat-eater settlements).
And yes public evaluation dies have it bad points. Ideas publicly debated are "in public" and deened to be published by most patent offices hence not accepted for a patent application. Idea owners' initial evaluation becomes important and idea owners must pay all cost to privately and secretly evaluate the idea.
ทำไทยทำ can give a solution to this dilemma by providing evaluation procedures and/or other assistance privately. Please, email me if you are interested in becoming evaluator panel members. Work and rewards will be discussed privately. We may discuss some issues here or in places in "links" below.