Disneyland is reportedly taking away benches and seats for visitors in a bid to help with "guest flow".
Fans who are regular visitors to the California theme park say they have noticed fixed seating being quietly removed over recent months.
And some have voiced their anger to the press and on social media about it.
They believe it is preparation for the bumper crowds that are expected to flock to the park when the new Star Wars: Galaxy's Edge opens next summer.
But concerns over the well-being of seniors, children and those less able to move - especially in soaring temperatures - have been raised.
Debbie Sinclair, a Disneyland annual pass holder, told the OC Register: 'It's getting harder and harder to sit down in the shade and relax.
"I'm really bummed about it, because I have bad knees and ankles. It's turning into Magic Mountain that's all concrete as far as I'm concerned."
Some also took to Twitter, with Tonia B writing: "WHY?? To get more people into your already overcrowded parks. What about seniors, disabled and small children that need to rest?"
Reirari added: "Yo disabled Twitter, @Disneyland is taking away seating. Be safe out there!"
While Barb tweeted: Has @WaltDisneyWorld considered the fact that multi generation families visit and sometimes I need to park the older people for a while with a snack or drink?
"Or the kids need to sit? Six-year-olds love sitting on the benches, eating a dole whip."
It is believed that the overall seat numbers will be brought back up to present levels by installing more seats in on-site restaurants.
A Disneyland spokesman told MailOnline : "We continually strive to deliver a great guest experience, and we are always looking at ways to enhance elements such as guest flow, seating, and landscaping, which play an important part of a guest's visit to the parks."