Hey guys,
I want to ask which captcha service is a better? im using right now DBC, but it is not so good, can someone recommend better service for recaptchas 4x4?

ReCaptcha is recommended quite often. (Also by authors of other captcha libraries) so it must be worth a look.

@happygeek - I read that as well. Here is Bruce Schneier's post about it last Friday: https://www.schneier.com/blog/archives/2016/04/breaking_semant.html

Basically, it all boils down to image analysis and pattern recognition. I used to do crude versions of this back when I was researching image processing algorithms (mid-1980's).

In which case have a keep it legal infraction, although I'm guessing it was just a spam thing anyway...