In the context of a crowded concert, people bumping into each other without malicious intent isn't aggression, it's part of the experience which people choose f

In the context of a crowded concert, people bumping into each other without malicious intent isn't aggression, it's part of the experience which people choose for themselves. Those that don't consent to such physical contact (like myself) hang out at the back of the venue away from the crowd push. For the people at the front of the crowd, getting jostled around is a desirable part of the experience which they opted-in for.