I'd suggest an audit of the privacy implications and Tor compatibility of the recommended blogging platforms (currently WordPress.com, GitHub Pages, and Tumblr), because the following issues are possible:
trackers running against bloggers, ie Facebook Pixel on login pages, Google Analytics throughout admin UI
trackers running against visitors to your blog (doesn't necessarily affect author's anonymity, but let's promote good providers anyway!)
author UI requires JavaScript -- will require user to disable NoScript
service may block Tor users or require them to fill out annoying CAPTCHAs
Cool site, thanks for making.
I'd suggest an audit of the privacy implications and Tor compatibility of the recommended blogging platforms (currently WordPress.com, GitHub Pages, and Tumblr), because the following issues are possible: