@Ben551 We did send a message on Sunday, but so far no reply. We also contacted airbnb, and they told us, basically, it's fine, they, airbnb, have the last name, which they will not give us due to privacy [???].
The CS rep did say that we could ask for ID upon arrival if the person didn't respond with their last name, but, they recommended against it, because the community is based on trust. I told them that trust goes both ways, and that someone staying in my home, where I live, needs to give a last name. The company has really become nutty, to say the least.