We're sorry you're that stupid

You get your water bill in the mail. You pay it. Two days later you receive an identical bill in the mail. Do you pay that one as well or do you, somewhat more logically, scratch your head and consider the possibility that something might be amiss here? Well, apparently some from the Stepford set paid the second one as well without questioning it, so now the City of Dallas gets to send out apology letters to these dolts.