When a user creates an account, I email them a link to verify their account. Are there good reasons to store either or both of the IP used in registration and IP used in confirmation? I've seen some developers do that, but it's not clear to me what purpose this serves? and if it's worth doing at all. If I do store this data, what can I use it for later.
note: I generally will store the last IP from which the user logged in, but wondering about registration and verification IPs.