not one bot spam request
I mostly operate forums, and at my surprise I never had a single spam bot posting either (whereas I do not require people to register before posting, but their posts are not going live until a human approve them). However, I have my own captcha-like solution, ready to be used in case one day bots starts posting at my sites.
I think that bots are targeting popular CMS, and are not "yet" smart enough to identify and use in-house CMS. They may not be able to identify forms within pages, or how to use them.
Some tips:
- do not use common form field names,
- add trap fields, with common names, if they are filled, then it's a bot :)
- inject form in javascript after page load, or, after a user action,