I'd be wary of making a thing like that. Even ignoring the EU's bizarre "Right to be forgotten" law, people should be allowed to change their opinion, and such a website would incentivise consistency only. Not truth; consistency.
Are you sure that's what you want?
Ideally it would have "he said it", "he did not say it", and "he has since retracted it". As is, you could find where someone originally said something, and have no way of knowing if it has ever been retracted.
If it's worth saying, but not worth its own post (even in Discussion), then it goes here.
Notes for future OT posters:
1. Please add the 'open_thread' tag.
2. Check if there is an active Open Thread before posting a new one. (Immediately before; refresh the list-of-threads page before posting.)
3. Open Threads should be posted in Discussion, and not Main.
4. Open Threads should start on Monday, and end on Sunday.