Working as a consultant for many years you see it and hear it all! I had a situation one time where we deployed a new Cisco WLC solution. I was asked by the management of the hospital if we could turn off the LEDs on the access points in the "crazy ward" as the access points caused a lot of extra attention.
This is real easy to accomplish. In fact you can disable all the AP LEDs or specific ones. If you choose to select specific access points you will need to know the name of the ap. First drop down into the Controller CLI.
'config ap led-state enable/disable <Cisco AP name | all>'
CLI disable specific access point LED named lab1131
(Cisco Controller) config>ap led-state disable lab1131
CLI disable all access points LEDs
(Cisco Controller) config>ap led-state disable all