I do likewise…sometimes to my detriment.
In college, I quickly adapted to the weekly visits from the cleaning crews that would come in and empty trash cans and do some quick vacuuming & bathroom cleaning. I’d just roll over and bury my head under the pillow, usually without actually waking up. Part of this was because the guy who used to do my room in my freshman year was deaf and reeked of cheap cigarettes. That year, my roomie often left the door unlocked when he left for class- he always had earlier classes than I did.
Then one day (freshman year), I was awakened by the sound of campus security pounding on my door. I let them in, and they asked me about a baseball cap and other clothes I recognized as being my roomie’s.
Turns out a burglar had been spotted on campus, and in evading security, ducked into our room, grabbed some of my roomie’s clothes to disguise himself, and continued running. He got caught trying to jump off a dorm balcony just down the hall from our room.
I had done my usual rollover and pillow duck without realizing there was a stranger in my room.
(Even if I had, I might not have noticed the difference in the dark room and barely awake without my glasses- he was roughly the same height and complexion as the janitor.