Seriously.
Now, I am not too worried at the moment, because I already have my Droid rooted and overclocked to hell and I plan on keeping this phone until LTE smartphones are released.
When they build their true top of the line Android phones, they are investing a great deal of effort into building them like tanks. I absolutely LOVE Motorola for stepping back into the phone game with the Droid, and they regained a lot of consumer confidence with the first Droid.
They will be able to keep a large majority of that confidence earned, as most people have no idea what root is, and some just have no intention of ever rooting their phones.
But if they commit to playing this game with the bootloaders for all their future Droid-brand phones, I will be seriously pissed. HTC makes some appealing phones, but the Motorola phones just have amazing build quality and I would definitely look to Moto first for my next phone. That is, as long as they don't pull something retarded. Maybe only the Droid X will have this, and not the Droid 2. Not that I'm buying either, but that'll at least keep me a fan of Motorola and able to recommend at least one phone to friends or family.
Well take that back, as if I know someone will never root their device or even do anything special, I'll probably recommend the Droid X or Droid 2. But for the Android community at large, it is quite the blow.
As far as GPL, I don't really know. I wouldn't think it violates any GPL but I could be wrong.