DCs school (bog-standard state secondary) has a great system for trips, where they all happen in the same week, alongside special in-school activities.
This means you get one trip or treat per year, and have a good choice of very expensive right down to free activities.
Yesterday, they had an assembly all about this year's options. They were told to go home and think about it, pick up the details today for the trip or activity they wanted to do, and then it was "first come first served" for places on the trips.
So this morning before most of the children had even collected their forms parents were signing up and paying at the office to get their DCs onto trips. One trip was "sold out" by lunchtime.
[name changed to Protect ID btw]
[and yes, I admit I was one of the ones signing up at 8.30]
But I still think it is unfair, and should be chosen by lot.