adults are prohibited unless they are accompanied by a child.
Disneyland has that same sign on the "Haunted Mansion" ride, but I don't think any non-accompanied adults have been turned away.""
SINCE WHEN??? I have been to Disneyland in Calif over 35 times, and it was almost always with adults only. I haven't been in over 10 years now, but if they actually have that sign up, I would demand my money back and never go there again. I always found the attactions at Disneyland to be very interesting in general, and the Haunted Mansion was a particular favorite.
The last time I went was about 10 years ago. I remember the sign in front of the "Haunted Mansion" attraction "no adults unless accompanied by a child under 10 -- grownups can get too scared" -- of course it's a spoof and not meant to be enforced.