WordPress is good for a lot of things, but sorting through spam from real comments is not one of them.
If you have ever posted a comment here on the blog, but then not seen it, it’s most certainly been caught in some kind of spam filter. We get about 300 of those every day, and most are indeed spam, but some are not and have to be manually approved. So if you’ve ever left a comment on the blog which was not published immediately, it’s not due to us deleting them; they’ve just become stuck in the various filters. We have recently taken steps to try and remedy this. Please take my word when I say that we would never ever censor anything you might have to say, whether it be criticism or just feedback in general. Hopefully from now on, things should run a lot smoother when it comes to comments and replies (actually my own replies often get stuck in these filters too.)