How can a Newbie be trustworthy unless he has done previous transactions and have good feedback? It's better to hire a escrow to safeguard the interest of both the parties involved.
I think he meant about a honest person who has a newbie account rank in this forum, of course escrow is a must when the user has no reputation, but as you said it could be trusted when he already had done multiple successful transactions. However each user has their own preference to judge the trustworthiness, just like a person think $50 is big, while the others think it's small.
How can you say that there was no money involved. He was looking for help in design and artwork and in return for sure he would pay the money. Now if anyone help him in his work and he goes away without making payment, the person who worked for him won't get his money and hence his time and effort will be wasted.
As I said previously, if he has scammed anyone, there's should be a scam accusation created against him.
loabiti33 haven't ask @OP to create anything and he not promise anything to pay, @OP is put a big hope for loabiti33 to reply his message. If I were loabiti33, he might already find someone and don't want to reply the others because it's wasting time for him.
Also as I mentioned. No money was involved but his actions was unethical and something that should be avoided.
All you can do is leaving him a neutral feedback, nothing more.