This helps me to quickly disqualify those sellers with homes in undesirable areas (at least for my company).

You need to get tough and not allow others, like your tenants, to drag you into undesirable situations and conversations.

A significant portion of students find that restrictiveness undesirable.

Asbestos siding and knob-and-tube wiring; even ungrounded cloth wiring is undesirable today.

1) laminate floors that sound like you are walking with tap dance shoes on2) vessel sinks3) anything that is painted "faux" style4) open floor plans (although I think this is still 2-3 decades away from becoming an undesirable floor plan) I have wondered for years what will replace SS appliances.

If you list it lower you will get more undesirable applicants and will have to screen and reject them.

Multifamily in the Memphis area especially duplex's under $100,000 are mostly in very undesirable areas due to the higher crime,vacancy and vandalism rates that come with them. 

Smart real estate investors use the 1031 rule to swap out an undesirable property, and then use it again to swap out the new property they’ve acquired.

Should I be concerned about increased liability and/or it being viewed as an undesirable tenant, should I decide to sell the property? 

The property is a “white elephant” with a layout so undesirable that nobody is interested7.