I came across this topic from WoWInsider about a player trying to scam a GM into giving his epic flight skill. None of this information is "earth shattering" but it is a nice glimpse into what info GM's have available .
Forum Post of the Day: Player tries to scam GM for epic flight training, gets shut down - WOW Insider
WoW Forums -> Lost epic flying skill
For those who hate walls of text I'll sum up what I think is important from these posts:
1. Blizzard's logs go back at least 2 months, but older logs are harder for GM's to pull up.
2. Blizzard logs guild chat.GM Auryk says "Alright, Kiranth, sorry for the delay I had a lot of information to look through. Seeing as how this took place about two months ago, the logs were a little harder to look up. Let me go though, step by step, and detail the turn of events as I see them"
GM Auryk says "or because you had to get a new computer (including a “fairly good graphics card” and double the ram of your old computer) as you told your guildmates"AND
I also find it a bit confusing when you mention on 03/01/2008 between 20:12:20 and 20:12:51 that you, “cant wait for the faster mount” because you “just need the skill [cause you] already have Red Riding Nether Ray”
3. Blizzard logs contain info on zone changes, AH transactions, and individual player gold amounts.
I have a feeling, however, that in this specific case would not have done much good, if any at all. The reason I say this is because upon doing a few searches of my own, I see that at 2/11/08 at approximately 20:48:45(GMT) you zone into the Outlands with 149 gold 98 silver and 42 copper. I see that at 21:38:05(GMT) you purchase your Red Riding Nether Ray (which at Exalted with Sha'tari Skyguard costs 160 gold). Following that, you log out with about 14g99s42c, congratulations on your Primal Waters selling. :0)