Sorry I just see a "In compliance with government regulation to provide you with a full set of search results you need to be logged in" prompt in the near future. If they can drive people to log in, or even better/worse make people who haven't had an account create one, I see some big financial incentives for them to do so. Of course that is going to be offset by the potential cost of any breaches, but I can also see the silver lining on that of raising a bigger barrier to entry for any new competition that wants to get started in Australia, and a bit of supporting legislation that blocks "non-compliant" search engines from being accessed in Australia might actual serve to increase lock in. Maybe I am just being paranoid, but when I see an Industry aligned body co-authoring legislation I start to look for their angle.