As much as I may say I can't stand stuff like this, and that everyone should be on the same side, I can also see why this could be a positive.
Is it really sabotaging? Peyton used to take out the propped door to the film room so it would lock, and Ainge would turn off Schaefer's alarm. Maybe it's just me, but if I'm on the receiving end of either of these, I'm going to be the victim of it one time only.
This reminds me of a kid, a guard, I coached a few years back, who (bless his heart) was just flat-out dumb. He's the only person I've ever seen where his confusion was completely evident on film, and I swear teams started picking up on this and exploiting it. After each offensive series, I'd get the linemen (the ones who didn't play both ways, anyway) together and see if the defense was doing anything different than what we'd planned for, and then make the adjustments.
Our center played both ways, and one time I didn't get him until after the third offensive series. I asked if there was anything unusual, and he goes, "Yeah, they're stunting right across us, so I'm doing this but they're just ripping right through that side." We had three games worth of film on this opponent, and they hadn't stunted like that once. So I asked our (dumb) guard if they were stunting, and he rather angrily and confusedly blurts out, "But they're not supposed to!" I almost choked, and finally said something like, "Yeah, well, they are, so we need to stop it." We made the adjustment, and he never could quite figure out how to do it...and we got shredded through that side the entire game every time they stunted.
If a QB can't adjust for an alarm that failed to wake him up, how the hell can he adjust for when a defense uses a zone blitz in-game that they haven't showed before? Or a simple rotation between a safety and corner? Or making sure that a check to a quick slant takes place, with a DE peeling off into that seam?