I like the simple human check tick box that appears with simple forms. It's called "human check" and requires a tick.
Can a spam bot be designed to automatically check boxes? If so, then perhaps two check boxes could be used, as below:
Check one box to prove you are human:
Check this box []. Do not check this box []
I know there are many ways to make tests more difficult for spam bots, if needed. This just happens to be what occurred to me now, and is not one I have seen elsewhere.
--
PJ Matthews, Kyoto
Migrated from Ning 2.0. Now at Jamroom 6 beta and using Jamroom Hosting for The Research Cooperative (researchcooperative.org)
updated by @researchcooperative: 10/14/15 06:25:45AM