My first and last question is, "How important is it?"
Many of my guests leave doors open, or the locks still in the handles. In other words, they're pretty laid back.
I generally stay well away from their rooms, unless I have something necessary to the maintenance of the room (i.e. smoke detectors, etc.) in which case I discuss it in advance prior to entering.
If someone leaves the lights on, all my bulbs are low wattage LED's. Not the end of the planet. I might remind them gently at some point - hey, people forget, including me. I don't get knotted about untidiness in their rooms, because I do the same thing when I travel.
However leaving the bathroom door closed after a shower can result in mold or mildew. Dirtiness, smelliness, exposed food, and/or lack of respect for myself and/or others, or some all round bad habits can disrupt me and the harmony in this home.
And on that note I remind myself.....
...that courtesy and respect go both ways.
...that my prices are a good value.
...that while I may get a bad review, I also have equity on AIrbnb. And I am equally capable of stating the facts in my review and rating accordingly.
...That I can, will, and do evict. I'm very effective, and very, very fast. At under $30 a night most times, my exposure is negligible. I run my own business in my own home, and I don't don't lose a minute of sleep worrying about losers.
Namaste.