I think people are confusing private fb with private auctions.
I have a few private auction transactions that have visible feedback on my fb. The private auctions, which don't allow you to see what I bit on, is cool. My total fb and the comments are open for all to see.
As a buyer, I can't control that someone made their auction private. When they leave me fb, everyone will still be albe to see the comments though.
Private fb, as in folks can't see the comments, is something else.
I actually like private auctions: I don't want everyone knowing what I buy, especially when goods get to be high priced.
I recently bought a part for my vehicle and I'm glad that auction was private. I don't want to be targeted or bothered due to the vehicle I drive.