As you mentioned, very recently we've seen in Canada and also in the United States the so-called Islamic State hacking organization, which released a list of names they claimed they had stolen from Department of Defense computers. The reality is that they had conducted open-source intelligence, a system typically called “doxxing” in hacker-speak, to gather up the names, locations, and social media identities of members of the armed forces. They have also used this technique to target Arab allies flying combat missions against the Islamic State and also against individuals who they alleged to be members of the Israeli intelligence service.
To date I'm unaware of any case where the Islamic State has successfully targeted an individual on the basis of that list, but certainly once that list has been created and published, it will be considered acceptable, authentic, and legitimate for any supporter of the Islamic State to act against an individual, and I absolutely expect they will attempt to do that.
If you look at the situation that occurred in Paris with the attack on the magazine Charlie Hebdo, that was a case where those individuals had been threatened many years in advance. It was some time later, but eventually they were indeed targeted.