Most of the comment spam I receive on this blog was coming from within two IP ranges, both belonging to;
I have blocked them in my firewall and would recommend you do the same.
aut-num: AS44557
as-name: DRAGONARA
descr: Dragonara Alliance Ltd
import: from AS13030 action pref=100; accept ANY
export: to AS13030 announce AS44557
admin-c: AGAV2-RIPE
tech-c: AGAV2-RIPE
notify: tech@dragonara.net
mnt-by: DRAGONARA-MNT
mnt-routes: DRAGONARA-MNT
changed: hostmaster@ripe.net 20080205
source: RIPE
I have blocked them in my firewall and would recommend you do the same.