My neighbors love our chickens too. I thought it was odd! We told them we planned to put a fence up between us and them to keep our chickens in our yard, and they urged us not to. They're an older couple and enjoy watching them. I asked several times because it made me uncomfortable, but they seriously insisted. I did tell them that if they ever changed their mind, we have the fencing and will put it up.I don't free range because I like my garden.
I don't free range because we share the property with my sister-in-law who would be FURIOUS if my chickens ate her beloved flowers and dug the mulch out of her carefully-tended beds.
I would be very upset to have someone else's chickens wandering into my yard to damage my garden and my SIL's flowerbeds even "only" once a month.
Not to mention the possibility that they might bring disease to my flock or that a neighbor's rooster might fight my roosters or try to lure my hens into his flock.