Oliver Corten has a post on EJIL Talk!: (http://www.ejiltalk.org/a-plea-against-the-abusive-invocation-of-self-defence-as-a-response-to-terrorism/) in which he presents a plea against abusive invocation of self-defense within the context of counterterrorism operations. I wrote about an emerging Responsibility to Prevent Terrorism doctrine after Colombia’s raid in Ecuador in which it targeted Raul Reyes (second in command of the FARC) in 2008. Both the OAS and the Rio Group reaffirmed the principles of sovereignty, abstention from the use of force, respect for the right of territorial integrity, and the duty of non-intervention. Yet, they also agreed that there is a duty to act in a preventive and responsive manner to terrorism but highlighted that alternatives should be pursued within multilateral or bilateral frameworks.(See “The ‘Unrule of Law’: Unintended Consequences of Applying the Responsibility to Prevent to Counterterrorism, A Case Study of Colombia’s Raid in Ecuador” in C. Bailliet, Security: A Multidisciplinary Normative Approach Brill 2009).
Since then, there has been a steady trend towards supporting recognition of an exception to the prohibition of the use of force as the new rule. Please read Corten’s plea and consider signing: (http://cdi.ulb.ac.be/contre-invocation-abusive-de-legitime-defense-faire-face-defi-terrorisme/)