Problem: Need to eliminate spam and robots while not hurting user experience Task: Users filter results but need to send a request to the server on each filter

Problem: Need to eliminate spam and robots while not hurting user experience Task: Users filter results but need to send a request to the server on each filter. They will probably filter ~40-50 times to fine-tune their search but ever since I introduced a captcha the use rate of the tool dramatically decreased. Curious what you have in mind. mmgfty@gmail.com