It's not so much about being curtious to people in wheel-chairs as it is about the apt. owners covering their butts and making sure they don't catch heat from anyone. They probably look at the ADA as being a pain the *** as you do.
oh i'm sure its the apartment wanting to avoid any chance of a lawsuit. Even if the suit is completely frivilous and unjustified. Its just annoying that they're probably gonna have these guys at the apt at like 7am when i work late at night and then there is gonna be a big lump in the room(that people may trip over depending on how its made)