These programs don't work for any length of time. They will eventually track you down even if you are going through proxies. They have a pretty sophisticated set up and they like the fact that people underestimate them.
I've tried most of the Craigslist auto-posters. They are all junk! I also read these forums and wasted my time with such nonsense. Then I found irobot - This thing is sweet. You can configure it to do anything on the web! You can autopost to craigslist, kajiji, backpage.... post to forums... You can have it check your email if you want. This is totally free... but you have to write "bots" for it. Anyone needs any help, PM me. http://www.irobotsoft.com/download.htm