I agree with everything above. Typically you need to look for "informative" posts than simply posts that tell you the answer, but that actually use data to back up there posts to some degree. For the most part there is no simple answer, but once you learn how to use the resources that are all over the web, you can figure out many things out for yourself. In my opinion _most_ but not all of the information you get from columnists will be one of a few things:
1. old - about players that anyone who actually pays attention to has already snapped up or had there eye on
2. sample size - Too many columnists write columns about guys who are hot for 1-2 weeks but then drop off the map because they had no actual ability to back it up, or they had the skills and are already gone in any league worth its salt.(see above) I love reading espns daily notes about matchups, aside from a few things about lefty/righty stuff and updates about who will be playing/sitting its all sample size gibberish.
3. Too much opinion about players without enough data and facts.
They do have some interesting stuff though specifically related to player injuries etc that can be helpful.(all that stuff is in the cafe though _very_ quickly, usually within 10 minutes if its an important player). I also do enjoy reading certain columns just for the "baseball related content" instead of actual fantasy advice.