This stupid.  Here is Fox New's Megyn Kelly talking to the White House's Bill Burton:

Look, it's quite simple, Megyn.

Is the White House asking people to write them with myths regarding healthcare?

Yes.

Will some of those emails contain the email addresses of other people (including the sender)?

Of course.  The White House has no control over what people put in their emails to the White House.

Will the White House be holding on to those emails?

Yes.  By law, they have to preserve the emails they receive.

But this does not mean that the White House is "maintaining a list" of people who spread myths about health care!

Sure, the information about myth-spreaders is there, but the White House doesn't care about that and they're not doing anything about that — they care only about debunking the myths themselves.