New submitter Mike Allton writes with the announcement from Posterous that the blogging platform will close at the end of April, after being acquired last year by Twitter. "It's been suggested that people should use platforms like Posterous or Google+ for their blog, and I think this is a perfect example of why that's a bad idea. When you use someone else's platform, you don't own your content and you don't have control over the platform. Do you have a Posterous account? What will you do with all your posts and content?"