While ip banning "works" is not reliable.. Theres millions of proxies out there so brute forcing that would be very easy.. Not a good option. Captcha on login is way better. Dont know why VB does NOT implement it. Specially after all the requests made.
Yes you right bro.Why vbulletian does not have captcha login plugin.Other boards having that plugins except vbulletian ..Hope some one will do it.