The online behavioral advertising world may be feeling a bit like Lindsay Lohan this morning — right after Charlie Sheen went self-destructive super-nova. Whew! Lindsay must have thought — at least the press is onto another whack job for a while. And so, in just a matter of days, persistent and growing attention to digital privacy issues and pending regulatory proposals took a hard left into Cupertino. The revelation that iPhones maintain on-board tracking of user locations (accessible to anyone with the device and the right software tools) just succeeded in moving the digital privacy discussion closer to the third rail that has been waiting for it all along: mobile.