Okay, I thought. We must have been in the room when they came back, too. We're adults. We can call for service if we need it.
"We've been under the weather so we were sleeping most of the day," I lied, like a liar. I want towels, not to make trouble.
Why not?
According to an overheard conversation towards the end of our stay: any notes they keep on people who have the Do Not Disturb sign up go to the cops. So they weren't keeping notes.
Normal course of things is, they go down the hall and do all the rooms, except the rooms where they have the Do Not Disturb Sign up or someone is in there and asks them to come back later.
Normally, they'd note those rooms.
Some hotels explicitly have a "Service Please" flag on the reverse of the Do Not Disturb sign, but this one did not.
I had to go to the desk a few more times, but I just kept up the "not feeling well" story.
It wasn't hard, I was genuinely getting over a bad cold.
Like I said: I did my best to not get anyone in trouble, as they were only doing their best to not get anyone in trouble.