2nd try at this. Everything I do will stop a percent of the spam bots that are not smart enough to crack the code. The captcha code is not the best because it is just 2 colors. Having a problem with the Multi-color version. This will eventually work but will take some server work. I have added a confirmation step to guests post. This should be very tricky for most bots. Lets cross our fingers and continue to give me feedback.
At this point it looks like our spammer(s) is(are) human. The current modification should stop spam bots. My next solution is requiring login. I am going to communicate this to Bill then I will flip the switch.