Integration with anti-spam module?

Yep, by itself it is open to Spam.

Captcha already works fine with the forms though - install the Captcha module, enable the "Add CAPTCHA adminstration links to forms" option on /admin/user/captcha and you'll find a link at the bottom of any authorcontact form to add the captcha to that form. Turn it on, adjust the settings for the Captcha and away you go.

Note: The following is for Author Contact module for Drupal 5.x. If you're using the Author Contact module for Drupal 6.x find below comment #5

Here is another way to add CAPTCHA to a 'Author Contact' form. Works for me with multiple themes and 'Author Contact' block display only to anonymous role:

1. Login as administrator
2. Go to:
http://www.yourwebsite.com/admin/user/captcha/authorcontact_form/enable?destination=
3. Under 'Select the challenge for authorcontact_form:' chose a CAPTCHA type.
4. Click SUBMIT button
5. Log out
6. Go to your page with the 'Author Contact' form. The CAPTCHA will be display under the 'Author Contact' form.

If that doesn't work, adding the module 'Form Store' might. To do so add Form Store module and retry above steps: http://drupal.org/project/Form_store

i goto this site admin/user/captcha/authorcontact_form/enable?destination= and there is no authorcontact to select... but the contact block is there...

Hi,

just wondering if there is a easy way or patch to put the CAPTCHA question within the Author Contact block?

As admin go to user mangement, CAPTCHA. Part way down the page it says

"Select the challenge type you want for each of the listed forms (identified by their so called form_id's). You can easily add arbitrary forms with the help of the 'Add CAPTCHA administration links to forms' option or the the CAPTCHA point form."

Click the CAPTCHA point form link which is

http://www.yourwebsite.com/admin/user/captcha/captcha/captcha_point

On there enter the form name of authorcontact_form , select the captcha style and click save. After that the form will appear on the main list.