Mitt Romney has been using Silversun Pickups' "Panic Switch" during official rallies lately, but here's the big problem -- he didn't get permission from the band. So, the Pickups gang slapped him with a cease-and-desist yesterday. Here's Silversun Pickups lead singer Brian Aubert: "We don't like people going behind our backs, using our music without asking, and we don't like ...