Yes it will now be manditory to get deloused before entering the gates of WDW.
I saw a special or it may have been SWA Airplane show that a man tried to get on the plane and he was so dirty they wouldn't let him.
Well when they opened his suitcase to get fresh cloths for him hundreds of cockroaches went scurrying around the ground.
So Bugs are part of traveling
Many countries require that you are sprayed for bugs ON THE AIRPLANE before landing. My wife was sprayed entering Jamaica and got a sinus infection from the bug spray.
The airline did not tell them they were going to get sprayed with insecticide beforehand.
EDIT:
Here are the countries where passengers may encounter a mist of pesticide fogging the cabin, requiring them to breathe the poison vapor:
Argentina
Australia
Barbados
Dubai
Fiji
Grenada
India
Jamaica
Kenya
Kiribati
Madagascar
Mozambique
New Zealand
Panama
Trinidad
Senegal
South Africa
United Kingdom
Or is that for dust mites? When I change my sheets at home I vaccuum the top of the mattress.

Also check the drawers and the walls on the sides of the bed. If you see powder in the drawers or on the headboard, it's likely that an exterminator has been there. I've never seen any signs of bedbugs, but I'd request another room immediately if I did -- and inspect that one just as thoroughly. 
Check over your room thoroughly at check in, keep your clothes in your luggage and your luggage off the floor, and you should be fine. And please realize, this isn't a Disney problem, a nice hotel vs. crummy motel problem, and it isn't an exclusively American OR international travel problem. It's just a reality of staying in rooms where lots of other people from a lot of other places stay night after night, and it's just a good idea to be prudent and check things over.
After reading this thread, I have to wonder....