: Are you sure that there is someone sitting and solving the captchas? Because there are a plethora of options for spam bots to solve captchas and captchas are not effective against spam bots

@Speyer207

Are you sure that there is someone sitting and solving the captchas? Because there are a plethora of options for spam bots to solve captchas and captchas are not effective against spam bots any more.

If he/she uses automated scripts and only the captcha solving part is manual, then there is something that you can do: Add a field to every form (for eg, user registration form, commenting form, etc) and cover it up with CSS so that they are not exposed to human visitors. A spam bot will fill it up and you can easily block all those attempts that fill up the hidden field. I am successfully using this to block 99% of spam attacks. Once he learns this, change the field characteristics. If it is a human spammer, then your options are limited.

You may refer to this drupal module that uses the technique I mentioned for more info.

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