NSA is preparing to employ psychological warfare against online threats:
"Operational attacks against an Internet threat would begin by locating and identifying the individuals involved in the hacks. NSA psychic warfare operatives would assess the targets to identify personality vulnerabilities and determine an operational strategy to remotely influence and effect changes in the bio-physical responses of the targeted individuals. An individual's propensity to develop a specific disease might be enhanced to 'post-select' development of the illness in the target, via emotional influences remotely driven by the operational officer. Feelings of illness or weakness might be enhanced to discourage unwanted behavior." From: http://www.americanchronicle.com/articles/view/239048
Should these psychic tactics fail spies can always turn to chocolate:
"A leader of the Popular Front for the Liberation of Palestine, Haddad was accused by Israel of responsibility for several terrorist operations, the last of which was the hijacking of an Israeli passenger plane en route to Entebbe in 1976. According to a recently published book by the Israeli journalist Aharon Klein, Haddad had a great fondness for Belgian chocolates. Mossad obtained some of these special chocolates, coated them with a slow-acting poison, and had them delivered to Haddad, who was then living in Baghdad, by an Iraqi official who was a Mossad agent and who had struck up a friendship with Haddad. Klein relates that the deadly substance was first developed in the IIBR and that its slow-acting and undetectable properties ensured that the agent and the instrument of death would not be discovered.
And indeed, following a gradual but severe deterioration in his health, Haddad was flown to a hospital in East Germany where he was diagnosed with leukaemia and eventually died on 28 March 1978." From: http://weekly.ahram.org.eg