I am not using Bitcoin ATMs because of the fees, a personal feeling on unsafety and being afraid of malfunctioning, but I think that they should exist if Bitcoin is to stay for a while. Op, I hope you're aware that such websites sort of exist already, right? CoinATMRadar is a good example, and I can see that it's been mentioned by other people already. Moreover, your website shows that there aren't any ATMs in my country, for instance, whereas there actually are a couple in my city. There are also quite a few in Hungary, whereas your map doesn't show them either. Good luck with the project, just remember about competitors!