Or you could do a much simpler thing and support HTTPS and not expect users to change ISPs (which is not always possible, e.g. in rural areas) or change laws (which is even less realistic) to browse your (or any other) blog. Injecting ads has nothing to do with corporate MITM, it's unquestionably bad, but unrelated here.

More to the point: serving your blog with HTTPS via Let's Encrypt does not in any way forbid you from also serving it with HTTP without "depending on third parties to publish content online". It would take away from the drama of the statement though, I suppose.