CVs like these are sanitized to only contain unclassified ingormation regarding otherwise classified work. So the problem here is not classified information leaks, it would be better ability to target certain folks based on their work (Although honestly, many folks who have done classified work seem to not use much discretion when setting up LinkedIn profiles).
[1] https://www.washingtonpost.com/news/worldviews/wp/2013/06/12...