maybe I should claim the same and make a thread with no evidence I really sent the coins.....and then claim someone is a scammer!
I don't really see how evidence could be posted without compromising my friend's privacy and security. Any evidence would of course be submitted directly to Jered Kenna (including an e-mail from the e-mail address registered with the account at Tradehill) should Jered Kenna provide contact details.
If there is no way to give evidence on your part, what is the true purpose of a public complaint and why should anyone take it seriously?
There are a couple of useful purposes. Firstly, it may draw Jered Kenna's attention to the fact of the claim, in the event that he is not aware of it (for my part I consider this doubtful, but who knows). Secondly, someone may be able to provide some information on where he may be or how he may be contacted. Thirdly, if he is in fact deliberately avoiding paying (because he is lazy, too "busy" or because he reckons he can now get away with it) he may reconsider his position if his reputation may be affected. Finally, it would encourage others to question his integrity when dealing with him in the future.
As far your question, "why should anyone take it seriously", you don't need to unless you plan to deal with Mr Kenna. If you do plan to deal with Mr Kenna in the future or trust him with your money, you don't have to believe what I am saying; you just have to weigh for yourself the risk of dealing with him based on the possibility of the truth of this (and other) claims or complaints. I have found forums like this to be an incredibly useful resource in assessing the integrity of individuals or businesses.
My point is more of a general one. If I came here and said that you owed me money, but I refused to provide evidence of such, why would anyone take me seriously? Especially if I was an anonymous newbie on a forum with only 15 posts and was posting "for a friend"? It doesn't really add up. In my personal experiences, threads like these are usually created by people trying to attack others' images more than anything else. I could be wrong, but I'm not seeing the point much.