IPhone: Is there a way for others to not be able to text me (Undelivered messages)?

I want text messages sent to me to be undelivered because some person is offended when I don't write back right away. Other than blocking them, I don't want them to think they can contact me at all. Is there some way to do this?

Some person is offended? Let them be offended.

It's not YOUR problem that the person is psychotic, and thinks they OWN you.

Why not just block the person?

Or just ignore their texts.