Some hotels change 'Do Not Disturb' sign policy - Hilton is joining other hotels in re-thinking the ubiquitous "Do Not Disturb" sign, reports USA Today. The McLean, Va.-based company is now suggesting that a team member alert a security or duty manager if a Do Not Disturb sign or light has been in place on a guestroom door for more than 24 consecutive hours. Other hotel companies have also changed the way they handle Do Not Disturb signs since the mass shooting in Las Vegas last October. Four Walt Disney World hotels in Orlando have replaced the Do Not Disturb signs with "Room Occupied" signs. Housekeeping and other staff will still be allowed to enter the room even if the sign is on the door, but must knock and identify themselves first. Disney is notifying guests of the new policy when they arrive so as not to surprise them. The American Hotel and Lodging Association, which represents the industry, says that most hotels have Do Not Disturb policies in place ranging from 24- to 72-hour time frames in which hotel staff can go into a room. However, one hospitality professor suggested caution as guests may see this as an invasion of privacy, so should gather guest feedback as they implement any changes.