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Mollom is pretty decent... http://mollom.com works with a lot of cms's It is commercial with 100 free positives per day, and can require captcha, but it tries to avoid it with a crowd sourced algorithm approach On 10/24/11 9:26 AM, "Ken Irwin" <[log in to unmask]> wrote: >Hi folks, > >Some of our online forms (contact, archives request, etc.) have been >getting a bunch of spam lately. I have heretofore avoided using any of >those obnoxious Captcha things and would rather not start now. (I >personally loathe them and they keep getting harder, which tells me that >the spambots are probably better at them than we are...) > >Does anyone have some good/easy/free/less-stressful spam-inhibiting ideas? > >One that occurs to me to try, and I have no idea if this would match well >with actual bot behavior: at the time the form loads, include at hidden >field with id=[unixtimestamp]. When the form is submitted, ignore any >forms that took less than (10? 15? 20 seconds?) to fill out on the >assumption that bots probably do it way faster - or possibly way slower? >Do they save them up for later? Should I add an upper bound? Is this just >a really dumb idea? > >If I try that one, I would start not by eliminating the bad results but >by marking them as spam and seeing how effective it is. > >Other ideas? (PHP-friendly answers would be easiest for me to implement, >but others may work too.) > >What works for you? > >Thanks >Ken