@Amy-and-Stephen0 7 years on Airbnb, last names have never been revealed until confirmation. It is relatively new that they stopped displaying photos.
For the record, I strongly encourage some thoughtful screening of guests rather than Instant Book - especially if your personal home is involved. However, I don't find that an "online background check" is a better measure of what to expect than the quality of communication in the correspondence. Your best experiences will come from guests who immediately demonstrate enthusiasm for something about your listing, gain your confidence that they've read the details and understand your rules, and respond easily to follow-up questions. But they might be people who value their privacy over being easily found online, in which case your background check protocol won't be of much use.