@Gail706 It also irks me and I am a host, not a guest. Everytime I read on a hosting forum that "low prices attract low quality guests", my hackles go up and I respond, trying to correct that attitude.
While it's true that if a place is absurdly cheap, it might attract indigents and the unemployed, or someone just looking for a hook-up space, a place which is priced for the budget-minded traveler is needed, and doesn't automatically attract bad guests, by any means. That notion is really discriminatory.
I have a budget priced listing for my area and I have gotten nothing but lovely, appreciative, respectful guests. Most leave their room and bathroom super clean and tidy, and they always clean up after themselves in the shared kitchen.
And just because a guest is budget-minded when choosing a place to stay doesn't mean they are really low-income or cheap. Lots of travelers don't care about fancy digs. As long as it's clean and comfortable, and convenientt to where they need to be, that's good for them. They may prefer to spend their money on buying gifts to bring back to family, local crafts to decorate their own home, eating out, taking a surfing lesson, or whatever.
And those "cheap" guests have brought me hostess gifts when they arrive, come home with a bottle of wine to share, cooked dinner and invited me to share it, insisted on giving me gas money if I drop them off somewhere, even if I say no need, I was going this way anyway, and even taken me out to dinner.
I love my budget travelers.