I use often surveys with tokens but public registration.
Most of my users become confused when they see the error message:
"the email was previously used"
There is any "remember token option" (where people can write their email and limesurvey sends to this an email with the token)?
It would be nice to have a new email template to configure "remember token" messages.
PS: I don't know if this post should be posted in "future features" forum.