They can ‘Opt Out’ of they want to, but very likely, their face and features will be captured and downloaded into the Disney Software anyway.
“I’m sorry. We have no control of the Software!”
Once something like that is available and easy to use, it’s very hard not to go ahead and use it. Same as police taking pics of license plates as the cars whiz by. It’s a calculated risk that the driver decides to take.
“Disneyland guests can opt out of facial recognition at park entrances”
You wanna opt out of facial recognition? Ok, get in that other line and get your photo taken....