My journal used to be accessible to the public for over a decade (transitioned across various platforms over the years), but no matter how much effort I put into keeping the journal anonymous, I would invariably run into some problem with the wrong people finding it, stalkers and whatnot.
Also, I found that keeping it online, publicly accessible, I would run into the Facebook Problem: where you start custom-tailoring your content to appeal to a wider demographic, starts feeling fake, identity angst, etc. I found that removing it from public view (currently: wordpress), I feel more freedom, more comfortable, not as stressed.
Additionally, as an experiment, I tried Tumblr out, my query being: if I tried to transform my written journal to visual/image based content instead, taking the words away... Astonishing results. Transformation, switching genres can be quite nice. Ties into neurolinguistics, the relationship between words, thought, how each transforms the other.