WordPress MU

I have recently had a number of blogs added to my site with such names as
kazuhiko talks
wam arlinda
swyxnmqs
woof poof marina
dani jotes
kippie notes
rickrd beeps
jacquelynn beeps and so on

When I checked the IP in my database I noticed that all of them except one came from the following IP 205.234.134.33
and all from a gmail address
the other one is
manboo The IP is 218.94.136.175 again with a gmail address.
I ran the IP's on Google and I think that they are both very regular spammers.
If I block the IP in my server cpanel will this stop it or do I have to bar them in mu as well.

If you block the IP in cPanel, it will stop them from visiting hence spamming your WPMU :)

Many Thanks for your reply, already blocked them in my cpanel.

First one is with a class c for hostforweb.com and within a servercentral.net (I think it's their) datacenter. I'd send a complaint with details to the abuse address for the first one with a copy to the second company.

Second one's China. Better chance of a snowball you know where.

Hostforweb, aka host4web, is horrid with that crap, and them bastard content thieves as well.

Although, I have gotten them to shut the content lifters down post haste when I call them.