Pray tell? What are you a vicar?
You're talking about geolocation using IP addresses - I'm not. I was answering a specific point about responding to spam in forms and that dynamic IP addresses notwithstanding, responding is a poor idea since it confirms that a computer within that pool of addresses is live and responding and therefore ratchets up the likelihood of further spam to that ISP and thus someone not as worldly wise & tech savvy as the august users of this place getting caught out.
If you want to have fun in this life, there are better, less damaging ways to go about it, which is advice I would offer anyone.