Charles Kelley, from left, Jason Aldean, and Darius Rucker perform "Midnight Rider" during a tribute to Greg Allman at the CMT Music Awards at Music City Center on Wednesday, June 7, 2017, in Nashville, Tenn. (Photo by Wade Payne/Invision/AP)
Charles Kelley, from left, Jason Aldean, and Darius Rucker perform "Midnight Rider" during a tribute to Greg Allman at the CMT Music Awards at Music City Center on Wednesday, June 7, 2017, in Nashville, Tenn. (Photo by Wade Payne/Invision/AP)
Charles Kelley, left, and Jason Aldean perform "Midnight Rider" during a tribute to Greg Allman at the CMT Music Awards at Music City Center on Wednesday, June 7, 2017, in Nashville, Tenn. (Photo by Wade Payne/Invision/AP)
Charles Kelley, from left, Jason Aldean, and Darius Rucker perform "Midnight Rider" during a tribute to Greg Allman at the CMT Music Awards at Music City Center on Wednesday, June 7, 2017, in Nashville, Tenn. (Photo by Wade Payne/Invision/AP)
In this Sept. 8, 2016 photo, country singer Jason Aldean poses for a portrait in New York to promote his seventh studio album, “They Don’t Know.” (Photo by Scott Gries/Invision/AP)
The days of friendly open crowds are seemingly gone. Both Keith Urban (left) and Jason Aldean (right) have experienced violence at recent shows. In July, 55 people were arrested at a concert by Mr. Urban in Mansfield, Massachusetts. There was even at least one charge of rape. A 22-year-old man was found dead — authorities said it was caused by extreme intoxication — after a concert by Mr. Aldean.