Translations:Manual:Combating spam/73/en

It may be preferable, instead of relying solely on CAPTCHA or other precautions which affect all users, to target specifically those IPs already known by other site masters to be havens of net.abuse. Many lists are already available, for instance $1 has a list of "All IPs in CSV" which (as of feb. 2012) contains about 200,000 IPs of known spambots.