Re: Hoist on own petard
"I can only assume that the stalkage etc moved into legal/crime territory... "
No, quite the opposite. It's clearly stated in the article that the 'stalking' involved keeping tabs on the PUBLIC (at least within Google) details of the calendars / projects of a few co-workers. Not having a legal/criminal offense to use as an excuse for the firing, Google concocted the "they leaked company data" reason (which however, the security team contradicted in their interview with at least one of the sacked people)
Either way it's the US, so Google don't really need a legal excuse for the firing, they can fire anybody at any time. The excuses drummed up are more of a PR thing