AirBnb says revealing our or our guest's personal information is not something they are doing, and others here say the same.
Evidently, anyone who use Facebook or Facebook Messenger on their phone reveals their location and the IP address where they connect to the Internet. Facebook uses this information to identify others who also are at the same location in order to make its suggestions of people we may know or want to know. Facebook shows their name and a little bit about them to help Facebook grow their network. There does not seem to be a way to turn this off in Facebook, unless you have guests who never use Facebook on their phone, or never connect to the Internet at your location. These seem unlikely that most guests would agree.
So, it's a Facebook problem.
My choice has been to stop using Facebook. It has brought other benefits, although that is another subject.