I am following this thread. I do not work for Disney, but I am a Sound Tech in a Seattle theatre.
I do check our infrared ALD frequently. Feel free to send a private email, I get so little feedback

about ALD systems. I have already learned that voices, both speaking and singing, are the most important thing that hearing impaired people need amplified.
I really apprecitate it when those who use the ALD write to the venue and tell me what worked and didn't work for them. Just addressing the note to
Sound Technician
RE: ALD System
"Theatre Name"
Address, City, State, Zip
would usually make it to the right person.
When you tell the ushers about problems it often never makes it to those of us who can do anything to improve the situation ...but when you put it in writing and send it to the Head Sound or Audio Technician, we ARE held accountable for the quality of the ALD. :guilty