I see the reasoning behind this and I think it opens up too many "possibilities"
"if you can prove without a doubt"
this opens up the opportunity for people to claim they are scammed and then they have moderators and other staff members committing crimes.
If you are scammed it really, truly is your fault. I know I've went first a couple times and I was like eh, probably not the best idea BUT I knew if I were to be scammed, it was a loss I could take. Personally, I would never execute a transaction I could not afford falling through. If it is something that would really, truly dampen your life for days or weeks after the failed transaction you should certainly go through A LOT more precautions than, for example, accepting a (I presume copy and pasted?) PM from Dave. You should be in direct communications with Dave. Dave should be copy and pasting the Skype chat log to prove it's him.
P.S. -- no offense to the user that was scammed in this way. I'm just saying, rather than having our staff members engage in such activity you should just step up the precautions that you take. Chalk the 1B up to a lesson learned and move on.
Also, although laws vary by state/country/continent, releasing a user's doxx is a very tricky matter for Sythe staff. I don't think you'll ever see a full user's doxx posted and not removed. Haven't you seen all the craziness that happens with leaked information and pictures around here? The bans are the least Sythe can do.