In reply to Mike Schinkel.

I think "delete upon plugin deletion" should be opt-in with the default to leave the data. It's a hard one because once a plugin is deleted, how is a non-technical person going to delete the data or even know what data is still there?

So it'll make life more difficult in that respect. I still think it's completely on the site owners and rightfully so. They need to have a plan in place for managing personally identifiable information from the start. However this is a solvable problem, it's WordPress — I'm pretty sure if the demand for form entry management were there, the supply would follow. 😊