I don't know if it;s a theory or part of being mature and respectful. Have the decency to say, hey, it's not working for me.Well, there's that...
In theory it's a good idea, though. If enough people tell you you're this or that or whatever, perhaps it's something you could work on. Unless the reason they ghosted you is because they're married, which is the #1 reason guys suddenly disappear.
Choose a simple phrase, no need to elaborate. But at least respond to a simple message to say you are not interest in moving forward with a relationship.
Simple, honest and polite.