Thanks. I accept that installed apps have privileged access to such per-device IDs, and can see why Pandora finds it useful... but it seems there should be some guidance against such use, or a mechanism for breaking such associations after a 'full wipe'. (Perhaps, the last part of the ID is an counter that increments each wipe.)

My sister seeing my Pandora stations is no big deal but if it had instead been a stranger I'd sold the unit to, that'd be more of a concern... and if other apps do the same thing, more important personal information could be at risk.