Bad advice from people "In the Know"

I am having to sit on my hands while I watch people give bad advice.  I was going to point blank call them out on it but I feel that it would cause more harm than good, professionally.  I used the analogy with a friend of mine it would be like picking a scab.

I have had to deal with this bully before because I called him out on a bad marketing idea and now he is still out there giving bad online marketing advice.  In telephone calls I had with him I offered to help him create a product and market it based on our interaction.  It would be a perfect lead in for a product based around car dealer search engine reputation management,  I guess now he is going to try to enter another field he knows absolutely nothing about and steal another idea.

Oh well I will work through this dip and keep on keeping on.  It is the low times that bring around the brightest times in our future.  Not that I am going through a low time per se, I am just going through a period of a lot of activity with very little return...