

Ever heard of counting attempts? Log the IP, present a CAPTCHA after 100 requests in a minute.
Besides, if I wrote a bot I would run a browser dialer from Chrome. It would request your site in a Chrome tab and appear completely legitimate to your stupid fingerprinting scripts
Yeah, it’s fine as long as you don’t block legitimate users. For example, when I use a VPN a lot of sites block me. Even when my actual IP is banned when I’m in China (4chan range bans Chinese IPs) or the website is blocked in China.