Can anyone suggest a way to block bots on our form fills? We have triggers set up that send an alert to sales each time there is a trial request. Yesterday we were besieged by bot requests. We discussed adding some additional filters such as "clicked a link" or "member of campaign". However this wouldn't work under all scenarios as we also have search campaigns running that lead over to form captures. My understanding is that Marketo doesn't support Captcha so I was wondering if anyone has discovered another mechanism to prevent bots in your forms. Thanks in advance for your help!