I've come across several IPs that are marked as belonging to RIM/Blackberry but seem to be a source of spam/fake users to our sites, examples :
http://whatismyipaddress.com/ip/93.186.16.213
http://whatismyipaddress.com/ip/93.186.23.80
Normally we this this warning ("recently reported spam source") with tor nodes and such, but how can spam be coming from the RIM network ?