Don't be defensive but address their concern and show anyone that reads their review that the host is active and cares about feedback.

You may want to live in a world of Wild West, anything goes business (I won't mention the orange haired political elephant in the room) but I assure you, your ignorant, uninformed, and weak defense of this sort of activity is not common.

Good lord, you people take things too seriously and come to people's defense as if they have been offended in some way.

They ask about staying long term, hoping the thought of all that money will entice you to interact with them and leave your defenses down. 

They’re your first line of defense in protecting your investment portfolio.

@Drew Sygit don’t be so defensive man!  

While it is wise to consider your possible resolutions to a bad tenant, the best offense is a good defense.  

The city is your first line of defense.  

Vapor BarrierA mobile home’s vapor barrier functions as the first line of defense from the elements beneath the home.

I need eyes on the house as close to checkout as possible and the cleaners are our first line of defense.