Found negative info on potential applicant before they applied

Someone responded to a rental listing and scheduled a showing. Landlord was looking up information on person's address, not intending to do a full background search yet, but the quick Google search revealed that the person was in foreclosure. 

Listing did not include address, and now person is asking for address in preparation for showing. Landlord is hesitant to give out address because 1) it is a waste of everyone's time, and 2) what if the potential applicant is desperate enough to do something like squat. How should landlord handle this? Are they obligated to do the showing, let the person apply, and then formally reject them? Can they just let the person know that they found the foreclosure notices and wouldn't approve the application anyway?

Thanks in advance for your advice and insights.