I'm not sure if this has been brought up before but it's been a topic over at TABN for awhile now. I think before the Creed tour w/Staind Aaron did this too, which I took it as a friendly joke but it appears he's at it again... except I think it's a bit over-board, taking shots at Scott's pitch problems. You be the judge.
http://www.youtube.com/watch?v=Lnx5r6OJB94
Hopefully things stay civil on the acoustic tour.