Double opt ins are obviously the best lists to have as everyone on them has submitted their e-mail, received a confirmation and then clicked a link on it to get put on the list. I just worry that I am going to send out the first e-mail and have it blocked by spam filters or just plain laziness.
What if I just sent an opt in e-mail that said “you have been signed up for this list, do nothing to stay on it, or click here to remove your name”. That would ensure that I didn’t have fake e-mails or people signing up freinds as a joke.
P.S. back in my college days, I did that once… in a prank war signed a guy up for the Army, Navy, Air Force, Marines and a few other recruiter lists. They got a ton of letters, e-mails and calls before they finally got their name removed from everything. He got me back pretty good though, but that is a story for another time.