Here's some helpful information I can throw out at you.
The ban rate is some-what lower with the annual pass.
You're FAR MORE likely to get banned when botting the economy (herbs, ores, etc.)
If you're botting the economy send the items to an alt and have him put them the items up on the AH slowly (Don't flood the Auction House)
If you're banned, call Blizzard ON THE PHONE and tell them you're sorry you've botted and that you understand it was a stupid mistake, but you just got a new job and haven't been able to play WoW as much as you once did.
TRUST ME, it works, my friend as well as numerous people I've known have been unbanned by saying that.
If you're not gathering shit 10-12 hours a day should be fine.
If you're gathering shit 6-8 hours is fine.
STAY OUT OF ULDUM!