They have to get control. Disney found that out the hard way that people will abuse a system to the breaking point.
I am confused by the idea that having people who can't stand for long periods use a wheelchair is somehow not a reasonable accommodation.
I am also confused by a person who can't handle the crowds in lines, but can go into a crowded loud, intense haunted house? How does that work? A person with sensory issues is fine in the houses, but can't handle the line?