I've noticed that a lot of people sporadically take down and then re-publish their blogs and Facebook profiles. It seems to be when they are depressed that they censor themselves . Then they put their published material back up. I've never seriously considered taking down manicnotes. It has to do with intellectual bravery. I've considered taking down my profile on Facebook when I've felt depressed. But I just leave it alone knowing I'm OK
When people are manic they feel immune to criticism and publish what they think is (or really is) the truth. Then they fall into depression, doubt the intellectual or aesthetic content of their material, feel embarrassed by their disclosures and withdraw. They should have the courage to bare all, stick with unfashionable positions and not be ashamed when they're wrong.
The way I think everything you write is like a tattoo. You should own it. Even if you don't agree with it later. It's intellectual honesty and bravery. It's history. Taking down your online material is akin to burning books in Nazi Germany.