I'm sorry, but downloading a geolocation database and using it to filter requests is not a lot of work.

Do you find it simple enough to volunteer to help him?

As anyone who invests an expanding amount of time and energy into a volunteer project knows, every new demand, criticism, or blossomed expectation is another grain of sand in your shoe. If you aren't ever given the time to wash the shoe out, eventually, it wears away your foot.

This guy is clearly taken on more work for this than he is actually able to provide, and the peanut gallery demands wont elicit anything more than a foul comment from him to you and reinforce the desire to wash his hands of the whole thing. What he needs is help, not snide comments about his capacity to do the job.