Rebel8: Ofcourse I do not know how the feature would be implemented.
I do not understand how the flag will "give the WTS minions less places to hide", can you explain this?. Supposedly someone who were looking for e.g. icelandic apostates would register a throwaway account, not use it to post (it is apostate after all) and then snoop out icelandic posters and go over their posting history to find if they wrote anything revealing. I imagine he would be mostly interested in the members-only section.
What is the best argument against giving users a choice to show the flag or not? 11 pages in and I cannot really tell what it is thought to be.