I've just had my sixth anonymous spam comment of the day, following on from 13 yesterday, and have therefore disabled the ability to leave anonymous comments. I didn't want to, as I know a) Not everyone has a Blogger account and b) There are sometimes good reasons for choosing to leave comments anonymously and c) I want to encourage rather than discourage people from leaving comments. However I'm getting so fed up with the spam, it was this or stop the blog.
On the plus side (I do try to find positives!) I probably don't need to moderate comments now, which will save me time and mean they appear immediately.
There is still a way to comment anonymously if you wish. It's a faff, but you can set up a separate Blogger account with a nickname or pen name.
There's no need to have a blog in order to comment here – you can create an account without going on to do that.
If anyone has a brilliant suggestion for avoiding spam and still allowing anonymous comments, please let me know!