.. mail, that is. Despite the pervasiveness of communications through the web, I still get a lot of pesky materials from my snail mailbox - not mails from friends, or the usual utility bill mails, but those ubiquitous unwanted mails from credit card, health, or insurance companies. These companies offer pre-approved plastic cards and pre-approved health insurance plans without you asking them to do so. I am sure most of us experience the same. Think about those annoying bulky mails which could be raffle sweepstakes or real estate open house invitations. Others, sell stuff like magazine and newspaper, cable or internet connection subscriptions, etc. In the first place, where did they get my name? Receiving unsolicited mail can be truly irksome. For one, junk mail is definitely not environment friendly. How many trees need to be cut to be able to send those voluminous and sometimes glossy flyer advertisements to...