Don't get me wrong, my motives for this post are entirely altruistic. I enjoy StackOverflow and I want the system to be improved.
I do not like your captcha. I like reCaptcha, but I also like making a lot of edits to my posts and so get hit by the captcha a whole lot more than is necessary. You must revamp the "heat" system used to prompt people with the captcha. For instance if your score is 1k+, then you shouldn't be prompted with a captcha as much. Basically I just want to make sure my posts are accurate and clean without deciphering an entire novel for Google's reCaptcha service.
I accidentally found a bypass to your Captcha implementation. When I make an edit, and get prompted with the captcha, press "back", and then resubmit the form. Presto! No annoying captcha! This back trick seems to only work when you are editing, although I haven't fully tested it.
My Request: Fix the captcha to prevent bots from damaging content and annoying everyone.