I agree, that there SHOULD be a way, but from what I've been told, this isn't like Facebook or other social networks where things that are posted sit in memory on some server.
Here, it is my understanding (not a clear understanding at all) things are encoded on the blockchain. This seems to be something that threads through computers worldwide, so as long as their are computers, the blockchain will remain.
I've upvoted and resteemed this @vinshero