I'm learning to spot the cheaters now...
Unfortunantly, because of the cheating problem they banned 2 users from the same IP. My wife and I would play all the time at home (one on the laptop, one on the desktop), and we're so competitive we would never give our words away, though we do think alike so we often guessed each other's words.
Now, we have no more iSketch from home
I'm forced to play it with her while I'm at work.