‘It’s probably the most explosive thing to tell the mass public, in terms of what it might incite particular people with a particular mental instability to do, and that's just one of the potentially detrimental effects of all of this, that I think it should be rationally countered to the maximum extent possible, and I think we're going to be beset with this issue for the forseeable future. ... We should be cognizant of the real world ramifications, intead of just speaking of it in the abstract...'