I'm fed up of people treating our house like a b&b.
First it was FIL, after he was kicked out. He behaved like a teenager: never tidied after himself, peed on the toilet seat, spent all night on the computer (and didn't turn the volume down), and ate all our food.
We have had a series of people stay now, and treat the place like a b&b. Dh asked me if it was OK before they came, and I agreed to keep the peace and because all these people apparently had no where else to go.
We never get so much as a thank you, pretty much the opposite. When an attempt is made to end the arrangement after it going on far longer than planned then we become the 'bad guys'.
Aibu to say no more 'guests'? Even if they apparently have nowhere else to stay, I don't think it is our duty to house them.