I've gone to the Disneyland's Mickey's Halloween Party 3 years now, but I have never been treated as I did this year. And I was not alone in this treatment,as my sister, parents(who I was not with at the park) and other park goers that I talked to had these problems.
But yes, The problem is ageism.
I paid extra for the ticket, just like families with children. I am 25, my sister 26 and whenever some of the workers would look up and see me, without kids, they would hold on to most of the handful of candy, only dropping in one or two.
And then, after like some of the Treat Trail, my provided candy bag was about 3/4 full I started getting them looking at my bag and grabbing only one piece to give me. I hadn't even visited every single Treat Trail, so it wasn't even a case of abusing the service or something along those lines.
My parents(who are in their 50s) had it even worse. And I overheard a man behind me in line complain to the worker that she grabbed a handful of candy, looked up at him, and then dropped it and gave him a bag of apples.
The first year I went to this party, it was so fun and everyone, workers included were smiling and having an actual good time, but this year they just seemed angry and bored. Not a single worker acknowledged me after I said thank you, or hello. One made me stop after I said hello and say "trick or treat" before I got any candy, and they said it in an extremely rude tone.
I very much doubt I will ever buy a ticket to this event again... but I was just wanting to share this criticism and see if anyone here has had similar experiences?