I never had any problems, even if a guy over 2 meters tall and over 150kg was so drunk that just by staggering he split the crowd in two, people were afraid of getting crushed.
But everyone was twice as big. I took his camera, told him to enjoy the show and took crazy amount of photos. Different angles, closer to the stage, vertical, horizontal etc. xD
On some positive note. Many years ago I traveled to Sweden Rock. There was Raubtier concert. Crowded as fuck. Next to me was this little swedish kid and you could tell that he like the band. He was trying to shoot some photos.