I think, that if I can register somewhere, add something ... I should be able to de-register, remove, delete it when I decide. (account, post, comment, whatever ...)

Nothing will be destroyed, no apocalypse, just user - one human being will get control over own content on-line.

The state, that I have no control over my thought online can stop me to express it.

One will not search for user, other has some policy, another take ownership ... how cool you are people!