We get this all the time too and we've never had any difficulty with this when we have been travelling as guests ourselves. People just don't bother to read their confirmation email.
We simply respond to these requests with.. 'you should have received our address and full directions in your confirmation email from Airbnb. If you have not received this email, please let us know and we will get it resent to you.'
Never give out your address via messaging.
Suprise Suprise, everytime this happens, the guest reads their confirmation email and arrives without any problem.