*It could be good for humanity to popularize some kind of sovereign kill-switch software. Something you install on your PC (so you don't need to trust some 3rd party) that would send an email to press/friends/social_media (with secret data you held because of threats) after few days inactivity.

If Kirk knew his at a risk of assassination, he could put all the threats/proofs in the kill-switch-message effectively punishing the assassinators post-mortem.

If every high-profile person did that, every government would think twice before taking down someone.*