Not to drag out the grammar police but I assume by "onist" you mean honest.
Honest has become a relative term today. Aside from a oxymoron like honest politician I think we all have developed a tendency toward lying. You could blame it on many things, from Bill Clinton, to the legal system, the destruction of the family unit, removing God from schools, corruption on every level, our online society, lack of face to face dealings, or any number of other things, but the truth is at some level all of us have some amount of greed. Greed is such an ugly word though so lets call it self-preservation.
Now today self-preservation can boil down to several things. Lets forget about death and imprisonment for a moment and think about what we really need to survive today. In modern culture the only thing that we really need to survive is money. Somehow we have been lead to believe that in order to get more money, i.e. "get ahead" we have to overcome our fellow man. And this has become a race to deceive the other guy so you can get his money. Who among us has not fallen prey to this "get them before they get you" way of thinking. Has anyone here not misled someone? For example when you sold your old truck and you told the buyer that you had took good care of it, but never mentioned how many times you overloaded that truck to save one more trip to haul firewood home. Or when you told your girlfriend's dad that your intentions toward his daughter were honorable. Or maybe that last post on an online forum when you stretched the truth just a little or maybe just flat out made up a lie. But you figure "It's online and no one knows who I am so I can get away with it." The truth is we all are a little dishonest from time to time. I am not saying this to take anything away from the guys here at AS because I have found it to be a good place for honest information, but at the same time it is an open forum and anyone can join. Just like anyone can post something on craigslist, we get the occasional nutcase on AS that gives bad advice and could post a piece of junk in the classifieds claiming it was the best thing ever. But it is still up to you to make sure that you are getting what you think you are and not believing it just because it is here instead of craigslist or any other site.
Sorry if I have derailed your post a bit because you have a good idea for an addition to the classifieds section. I am just saying it will still be buyer beware. Don't trust anything online. Check the facts and make your own decision.