I have a large list of tor servers, maybe 2,000+ servers that I would like to ban from registering accounts on my site. Is it viable to block the entire list I have in an .htaccess file or will this cause the server to slow down in the same way having thousands of hosts in iptables will?
Is there another alternative? I have captcha already but bots aren't the problem. The problem is users using tor to circumvent bans.