I would like to say I could just fill you in, but I know that because of the “right to forget” stuff going on in Europe, the Article 29 working party is working on this. I don't know what their technical committees are doing. It would be a very good idea to set up a committee, led by the Privacy Commissioner, with industry and other stakeholders, like consumer groups, to start doing the same thing here.
You're right; it is terribly difficult. There are other pieces attached to this that will be affected by it, and yet there seems to be a need and a want on the part of users to have certain things deletable.
I think we can do it, but it's not a matter of just passing a law saying you should get a delete button. I think it has to be done in combination with everyone or it won't work. It will be interesting to watch Europe, because they promote talking about it, but at the end of the day, they tend to pass laws, so we'll see.