Piggy bank runs scrapers it grabs from arbitrary third parties. We need formal technical, as well as social rituals and supporting technical mechanisms for controlling the risk this creates.
Formal technical mechanisms certainly means finding a way to run the scrappers in a 'sandbox' of some kind that limits the damange they can do. For example we could mimic this the what GreaseMonkey does, or we roll our own solution (see below for why that's desirable).
Social mechinisms (and supporting tools) certainly means ways that users can be aware of changing scrapers and are given the opportunity to assess if they accept the risk of downloading and updating scrapers; including tools that allow them to clearly see the particulars of the changes.
