Well, disestablishment would bring the church down, and it would smash them, but I don't think that standing there when the Diocese and police set upon me with a sign saying 'disestablish the church of england' would do the trick! :)
Disestablishment would hopefully leave the greedy fat wealthy side of the church either in parliment or lost and the good remainder could return to worshipping God, is there a good remainder? maybe the good remainder would make up a church or two or become Catholics. As long as the Catholic church does not become overrun with greedy selfish old people.

Actually, as I think about it, please could the CofE join the baptists when they disestablish, the Baptists are the next deadbeat sexist and lost church, so it wouldn't do any harm, they can have the methodists at a pinch but we would prefer to keep them pure but stodgy and boring, but we don't want our churches ruined.