Well, not sure how it is in MA. But in Cali they do a background and polygraph, with the background check often times asking you to list all email address, screen names, etc. that you use and the poly confirming you didn't withold anything. You never know if a BI would look upon you discussing employment in a regional forum as a bad thing or not. I know it makes no sense what so ever, as you didn't say anything inappropriate. But, since you can't control how someone else might perceive it, better to put as little out there as you can.