I realize that Anonymous is simply in it for the personal aggrandizement, but releasing such information publicly simply compromises their intelligence sources. Which, honestly, probably isn’t that intelligent to begin with.
There might be another reason as to why Anonymous chose to release the info publicly. The government intelligent community was probably ignoring that which Anon was telling them because the govt is disregarding the source - Anonymous. Given this, Anon chose to bring the threat to the attention of the public after repeated attempts to the feds.