Ultimately, maybe not, but I finally dabbled in geolocation on a property that was receiving comment spam. I ended up eliminated 100%, not nearly 100%, actually 100% of the spam by blocking anonymous content from one country.
In another application I got rid of 90% of the flash wear on an IoT device by blocking a single country from a port.
A determined, targeted attack will go around a geoblock, but I have to reluctantly admit that it can be useful for the high volume attacks.