Tech services had a particular time with these signs; a guest would complain about something broken, the tech would show up to fix it, find a DND, and walk away as policy.
As WDW is a self insured property, it's also financially worth while to take this step. They've had guests with medical issues who were only found after the mandatory welfare check after the DND was on the door after 48 hours. Fighting lawsuits from family after a guest is left injured or passes on is a huge cost to the resort; only takes one of them per month to make this a financially viable choice.
Lastly, it's also a staffing issue; you book in staff to handle so many occupied rooms, a significant portion has DND signs up, which means you're overstaffed. Next day, few DND signs, and you're suddenly understaffed and scrambling.
As for privacy, you're renting a room; if you're really bothered by someone entering, stay somewhere else. Steps taken to help guests, however, include scheduling when ‘Mousekeeping’ won't visit, so if you want to take an afternoon nap, no problem.
“As for privacy, you’re renting a room; if you’re really bothered by someone entering, stay somewhere else.”
Yea, some of us do have a problem with being intruded upon in hotel rooms.
But then we’re freaks anyway, because most of us voted for Trump.
So thanks for the advice, we’ll explore other options.