Standard response
How exactly do you categorize cables as standard? Don’t cables come in all shapes and sizes and serve different purposes? Anyway, this has got to be one of the greatest ways to break the ice with a total stranger. If you don’t know what to say, just send them a picture of something and tell them what it is.

And that’s exactly how the OP responded to this wrong number text. By uploading a picture of a standard cat, perhaps the guy on the other line would buzz off. It worked, but he left a “nice cat” remark before disappearing for good.