That was a given. You publish the details like this and there's no way the paramilitaries are not going to get hold of it. These are people who are capable of finding out that a senior police officer coaches at a local sports club, when he'll be there and shooting him in the car park. At least some of the dissidents were in the old Provisional IRA and will have learned their intelligence skills there. A little anecdote from the old days to show what they were capable of, told by the then chaplain at the jail concerned.
Among the IRA prisoners held at Magilligan Prison near Londonderry/Derry was one Miller. Even by IRA standards, he had a particular contempt for the prison officers and didn't bother hiding it. One of the officers had enough and decided to show him who was boss by telling him that his regular copy of the Daily Mirror would be withheld until he changed his attitude. Then at the end of his shift, drove home - 60 miles away as part of the common security precautions. The next morning, he went to his car, checked underneath it for a bomb as he always did. Good, nothing there. So he opened the car door, ready to get in and go to work. Although the doors had been locked, there on the driver's seat was a copy of the Daily Mirror with a note: "Give this to Miller. Final warning."