Every day tons of new proxies appear. So I believe that could be time wasting.
BTW where are you planning to ban them?
I’d ban then in cPanel/htaccess.
I understand. But what kind of site you have? What would you like to do that for?
What’s the difference? Can you just name some major proxy site like those two I said above?
Thousands of proxy sites come and go all the time which makes it near to impossible to ban all of them by their IP.