I’ve shut down the ‘blog@’ e-mail address I used exclusively for leaving comments on other people’s blogs. I’d started getting ~25 spam e-mails a day at that address and decided to kill it before it got out of hand. Spam seems to grow exponentially. 🙂
Now e-mail to that address will bounce with a message and a link to the contact form; just in case it’s from a real person.
Since leaving an e-mail address when adding comments on blogs has shown itself to be unsafe, I will continue to use the ‘blog@’ address whenever an e-mail address is required. On a related note, I still don’t understand why someone would make an e-mail address required for adding a comment.