Any creep who was actually involved in HT and using a WDW resort room would no doubt know about the room checks and would make sure that there was no evidence in the room and to stay out of the room during the day. For the rest of us, this is just theater.
And . . . besides all that, as someone who's been staying on-site at WDW for 25 years now, you'd think they'd have a different system for repeat guests In my case, WDW even knows where I am the entire time I'm there since I never go off-site and I'm always wearing my MagicBand.
On a similar note, I was at Epcot one day last week and was among the 35+ people I counted in the you-flunked-the-security-check line, something I didn't experience there or at any other park during my week-long stay. When I finally got called by a security guy, I told him if he was going to inspect everything in my backpack, he had to put gloves on. This did not go over well, but a different security person came and did put gloves on. It was really ridiculous. They opened tiny little pouches I have with things like hairbands in them.