How do you manage a client who ignores your boundaries and texts you at night?

[Btaliat]

After you must have told the clients about your boundary and you have warned about the incessant messaging at odd hours, you don't need to be entertaining such clients. Just ensure that you don't reply the messages. When you refuse to do that, he may get frustrated and stop the act. When you give them the audience that they crave, they may not stop even when you want them to stop. What has worked for you?