Here is an ad at the bottom of an email received from a Yahoo email address: All New Yahoo! Mail – Tired of Vi@gr@! come-ons? Let our SpamGuard protect you. Of course, by inserting the word "Vi@gr@" into this email, Yahoo are inviting it to be blocked by the spam filter at the receiving end. Not very smart. I wonder how many millions of Yahoo emails this has been added to - and how many have gone astray being mislabelled as spam as a result?