I was cleaning out my Yahoo! Personals mailbox and re-found a useful feature- the ability to easily let people know that you are (not) interested in them. Most times people either delete the email or send a generic wink and move on, depending on the circumstance. At Yahoo!, once you have selected email(s) to delete, you are presented with a drop-down list of common courtesy replies. You are also presented this option from your inbox after you choose to view someone. A great idea, why don't more services offer this option?