Must Reply To Every Inquiry?

[Art Maydan]

If I can tell from a prospect’s initial contact that they’re not someone I want to do business with (rude, rushing me to reply, bad grammar, etc.), do I have to even reply? Is that something they could sue over? This one lady emailed me at 1AM this morning and has left several voicemails since demanding to see the property ASAP. I wouldn’t normally even reply until I take lunch at work, which nobody has had any issues with so far, but can I just ignore her altogether? I’m house hacking and already know this person is not living in my house. Do I have to go through the motions?

I know I have more legal leeway due to owner-occupy "choose your neighbor" law, but let's pretend this is strictly a rental. What then?