We have a secret integral anti-spam defence. Plus you can use a list of stop-phrases (it is off by default). To turn it on choose «Stop-words», «Stop-phrases» in the Management section of the administration panel. You can edit and enlarge the list with links and advert expressions by your discretion (by the way, here is a nice set-list). Comments with stop-phrases will be automatically sent to premoderation. Read more.
NB Some spammers are the best minds of the mankind, so the war with advert of wonders for virility has no end. Don’t hesitate to write to our support with any case, we’ll fight with spam together.