I have a rule for charging guest, of it is something below R$5 (1.5 dollars) I do not charge, it is the cost of doing business. If it is a penny over that, I send a money request.
My prices are low, if I don't charge for damages It can really hurt me.
I just noticed today a glass missing in one of my units, it costs about R$3, so I wont chage. If it had been a plate R$15, I would have charged.
If we became afraid of bad reviews because of things like this, than we are going to loose money.
Remember, we can reply to bad reviews. If I got one because of something like this I would respond with (even if the review did not say anithing about being charged, if the guests lied about something)... Sorry you feel the need to act this way, but when there is damage to our property we do charge for it. Please be more considerate when staying in someone elses home.