A friend of mine in the UK pointed out a similar instance to the DHS E-Mail Madness that hit in early October. The British Computer Society (BCS), last week sent over 700 members an email without using the blind carbon copy field, like what happened in the DHS incident. Ironically, the email was a request for people to fill in an online survey on BCS customer service satisfaction
As per the DHS email situation, recipients responded with "unsubscribe me" messages using the reply all, which of course got more people annoyed, etc. At least there were no reports that people used the email to solicit jobs or votes for Parliament. Must be that famous British reserve.