we have a members e-mail latter and yes having the system send an e-mail to the persons adress where they have to click on a link to verify is worth its weight in gold. we keep a seperate log of the non verified and you would be suprised at what people try to put in like bush@whitehouse.gov so definatlyt use this as a screen to help the lists.

over that and the cancel link , the only reason those graphic letters weer put into systems was to stop robot signups and those are more for systems like domain registrations or things like that, I dotn think a robot sigining up for 1000 e-mail letters or a porn info will benifit the robot owners so I wouldnt bother with that part.