14 year old at an arctic monkeys concert?

my cousin is 14 and her and her friend are planning on going to see arctic monkeys at the iTunes Festival. i was going to go, but i can't... i have plans... I'm so gutted. but before they go i want to know if it will be safe for them. i don't mean getting home because they're capable of that, but i mean in the venue. please give advice :) thanks