The thrill of seeing Amnesty introduce easy online petitioning has evaporated after reading this WebSense Security Labs report:
Between May 8 and 9, 2012, the Websense® ThreatSeeker® Network detected that the Amnesty International United Kingdom website was compromised. The website was apparently injected with malicious code for these 2 days. During that time, website users risked having sensitive data stolen and perhaps infecting other users in their network. However, the website owners rectified this issue after we advised them about the injection. In early 2009, we discovered this same site was compromised, and in 2010, we reported another injection of an Amnesty International website, this time the Hong Kong site.
read the full report on WebSense- Security Labs.