Ok, haven't quite wrapped my head around all of this yet...
Are a lot of people using GF as a newsletter sign-up form w/o email confirmation? The email confirmation is just a security deal right? Make sure the address is coming from a human...
Does it really matter?
I think email confirmation for newsletters is typically more a confirmation that a) the user entered the correct email address and b) if the address registered for the newsletter is not correct, the owner of that email address can unsubscribe immediately or prevent the subscription all together depending on your setup.
In regards to whether or not Gravity Form users are implementing such a system... I have no idea.
