Ну вот - прояснилось, получил мыло от владельцев одного из сайтов:
We are sending you this email to notify you of a breach of our data today. At 1.50pm we became aware of the breach. Following this we received several spam emails similar to the one below (which you may also have received by now).
mail
We shut down access to the site and database at 2pm and immediately informed the Data Protection Commissioner and the Gardai. We take this incident and any attempted breach of our database extremely seriously and this is being investigated internally by our own people, externally by Brian Honan who is a security expert and by Gardai. We are doing everything necessary to have the website back up and running securely as soon as possible. Please bear with us while we complete a thorough and professional review of the site and it’s security provisions.
и етц...
Т.е. приличный файрвол, немного мозгов и какой-то антивирь в большинстве случаев достаточно...