@Mary703
I have 3 areas in my home with this sign:
PRIVATE (large font)
No guest access (smaller font)
Thank you!
It doesn't feel offensive to me and in 50+ guests so far I've never had a single issue! (I know because I have motion sensor cameras in those areas which are disclosed in my listing) Maybe the "thank you" makes it seem less "KEEP OUT OF MY STUFF!!" LOL!
One is on a bedroom door directly across from the guest room. Another is on the door to the garage. And the third is pinned to a curtain covering the hallway (which includes a laundry area/closet) to my room.
I also think guests appreciate clear lines. Okay, this area I can't go in, but anything not marked is fair game. It actually might make guests feel more comfortable about the common areas as it's clear, I'm allowed to hang out and relax here!
EDIT TO ADD: I know the cameras won't keep people out, but at least I'd have verifiable proof if anyone did get the urge to snoop or steal.