I may not be a fan of BTR, I’ve never listened to their music or watched their show. But IF I lived in the US, and went to the BTR/1D concert, I’d AT LEAST show respect. I’d back a bit so the “real” BTR fans could get closer to the stage, but I wouldn’t leave or anything like that. I’d probably enjoy the music and have a blast even after 1D’s opening. THIS IS A “WARNING” FOR THE REST OF THE US FANS WHO HAVEN’T WENT ON THE CONERTS YET, SHOW SOME GOD DAMN RESPECT WHEN YOU GO!