If you leave a comment, and you want me to respond to it – you have to include your email address. I cannot answer anonymous comments, as they don’t provide me with an email address to respond to.
On a similar note, we are having comment-spammers invading the I-N Journal at present, which is why we now manually close the comment option after a few days. If they invade this blog – I guess I should rather say when they invade this Diary – I will no longer allow anonymous commenting anyway. That should keep most of the spam away, I hope. So you might as well get used to signing in.