I don't know if it already exist I tried googling for it but couldn't find anything.
There needs to be a site like mega upload where you can upload a file and give out the link. but the contents (be it files or text) is not accessible unless the uploader didn't log in for more than a week. It would let reports and such release files if something happened to them.
There is probably something out there like that I just can't find it.
Kind of what you are looking for:
http://www.deadmansswitch.net/