Currently, in order to combat spam, you can ban certain IP addresses from editing a wiki. However, this does not stop malicious individuals from accessing a wiki and disrupting email newsletter registrations, advertising, commentary systems (i.e. Disqus), etc.
This should be changed to allow wikis the option of completely banning an IP address. Wikidot should allow admins to have two choices - ban IP addresses from editing wikis and ban IP addresses from any access to a wiki.
This is especially important for any large or commercial wikis.
Just being able to SEE the IP address of those abusing would be a help.
(ironically brought this up in the Mailform Module discussion exactly 1 year ago)