Computer Professionals for Social Responsibility: Statement on Attack

This statement from CPSR includes the following:
It's certainly true that cryptography and the Internet could be used as tools for planning of terror. However, these tools serve useful, valid purposes that should be protected. On September 11, we learned the awesome destructive potential that commercial jetliners have when used as weapons, but no serious commentators have suggested banning passenger airplanes. Cryptography and email have been lifelines for oppressed peoples fearing reprisals for open communications.

I would like to add that there are people being oppressed or communications stifled by national governments, including those in the USA and Canada (EG: anti-Globalization activists). Any proposals that include handing cryptography keys over to "Law" and/or domestic/foreign policy enforcement officials (EG: various Key Escrow proposals) are effectively a ban on cryptography.