However, it is courteous if you are going to ask them questions, you let them know you're just educating yourself before you purchase (and if you are speaking with other agents) and to offer to buy them coffee/lunch/a beer.

Remind tenant of their lease obligations.Be professional and courteous in all communications.

It seems the courteous thing to do would be to politely decline the business. 

Always be courteous and expect to show copies of your utility bills, other expenses, lease agreements and tax returns to verify income and expenses

Be courteous not to burn the bridge though. 

How does "THe Gatekeeper" treat you on the telephone,are the helpful, courteous,responsive,,,,,?

For these little community banks, be very courteous and easy to work with.

The questions I get are not out of courteously with the intent to learn but more so out of jealousy and has strained at least one friendship.

However, since they are often unoccupied with an occasional 1 or 2 people staying there for a night, I think they pretty much stay below the radar, especially if the tenants behave themselves (park in designated areas, keep their commuter car in decent running condition, keep the noise down, behave courteously to the neighbors, etc.).Remember (I really hate to pass judgement or perpetuate stereotypes) your typical crashpad tenant is going to be a professional aircrew member that has been screened by their company for certain standards of character, reliability, ethical behavior, and so on.

Come on folks, TRY to be courteous and thankful.