Hi @Sarah221
You can flag this guest and provide the details you shared above. The appropriate department will then review this guest. Please visit the following link with instructions on how to flag this guest.
https://www.airbnb.com/help/article/4
To flag the guest's profile, click on his profile photo and you will be taken to his profile page. Under the description of the guest, there is a link to "report this user".
Here is an example of flagging the host: https://goo.gl/F2hcek
You could also flag any messages in which you think are inappropriate by scrolling over the message and there will be a flag that pops up on the right.
Here is an example of flagging a message: https://goo.gl/oclnWv
David
Superhost Ambassador ~ Host Club Community Leader ~ Experienced Co-Host