I've noticed that a lot of people are dismissing other people's complaints this year as just moaning for nothing. Especially on the Facebook groups, people telling others not to bother trying for tickets for raising genuine concerns.
Glasto isn't untouchable, just because they've been going this long there's always room to improve. Primavera this year had a lot of problems on the first day and they listened and sorted it out for the remainder of the festival. If Glasto ignores the overcrowding issues it could one day result in a dangerous situation.