So you would argue that behavior on forums or other social media sites doesn't have any professional implications? I would think that people that have been fired over what they've posted on Facebook would say that's not the case whether or not you agree with the reason. And while I can't think of anything that someone would do on these forums that would get them fired I can so that if I knew a job candidate posted here I would take a look at their posts to try to get a feel for what it would be like to work with them.