Create a new account on the websites they require and direct them to that account, or upload other contact information but don't give out passwords. Only include the information you want them to have.
If you don't have Facebook, create a FB account with a few pictures of your life and minimal information, then use that to link to Airbnb.
Your potential hosts want to be able to know that you are a real person with a real home and real friends, not a shadowy underworld figure.
Try Googling yourself and see what all you come up with. Then link your Airbnb account to that, because it is public knowledge anyway.
There is no privacy on the internet.