I have thought about this too. I try to post generically so that there is not too much identifying information. I think how many posts there are here in a day, how many forums, and it could take someone hours, days, weeks of reading to figure out who we are.
A lot of the WS's read the same playbook, though, so many of the stories sound the same, another reason it may be difficult to figure out who is who.
Also, being a year out from D-day helps too; I would imagine if you were close to D-day and actively posting frequently, it might be easier to figure out.