Hoi !Hubzilla Support Forum
Not sure if this is the right place for this, but I figured I'd reach most hubzilla admins around here. A number of hubs and other social sites have received registration requests from the email address
which belongs to a throwaway/temporary email service. Go to getnada.com to see the content of that temporary inbox for yourself. Fellow hubmins may want to keep an eye on it or perhaps just drop the account right away.
Other sites around the social web may also be targeted.