I tried clicking on a few profiles I hadn't seen in a while and a lot of them had nice posts too. I saw everything from them for about a month then it disappeared again.

I am very worried about what will become of all the very private stuff in their database as they begin to decay.

Right now I assume it would take very sophisticated effort to steal all that messenger data, but what about if/when Facebook is a zombie company with a skeleton crew or an unloved subsidiary of a conglomerate?