Personally.. I wouldn't have posted it. If I had posted it, I'd probably go back and delete the whole thing.. but if you don't want to do that, ignore it.
I'm the "Social Media" person at my company. I moderate our national Facebook page among other things. Checking people's facebook/linkedin/myspace/whatever is usually part of our hiring/research process not only for new hires but current employees. I've had to figure out a balance for my own online participation here, there, everywhere. I'm cool with not being anonymous here. Most people who know me know I'm in recovery. Facebook is a very unique creature in terms of exposure, privacy and the like.. I don't ever post anything recovery related there, which really just comes down to a personal choice. Just be careful