They should run a few public information commercials to get people trained to ignore these things. A lot of people not used to tech are getting robbed blind by these arseholes.
I'm currently running at a recorded message phone call every other day telling me I'll be arrested by Revenue and Customs if I don't call them back.
A good tactic, by the way, if you do get a human being on the end of a phone call, is to say "just let me get a pen and paper", lay the receiver down, and then go and watch TV or sip a few suds. Wasting their time is about the only way we can hit back at them.
Could there be any greater conceit, than for someone to believe that the universe has to be simple enough for them to be able to understand it ?