Quote Originally Posted by Coins2012 View Post
We are still on version 1.5.2 and ZC 1.50, lately I am getting spam testimonials from registered customers, I think these are paid people that create account and put spam testimonials, I am having a hard time finding the customer that wrote the testimonials so that I could block him/her from logging in to the account.
The same thing was happening to us on an epidemic level. I tried everything. Finally I seemed to completely eliminate the problem by installing a simple CAPTCHA into the form. The testimonial will now only submit if the person types a matching number from the CAPTCHA.

That's something you might want to look into implementing to see if it helps/