http://en.wikipedia.org/wiki/The_White_Plague Molecular Biologist goes crazy after his wife is killed in an IRA attack. Develops a virus that kills only women. Great story and delves into the ramifications of what is right and wrong when it comes to science. Personally I think all good reasons to obfuscate, prevent, or hide scientific research - as long as it doesn't hurt people - are all short term. The security gained from ignorance will only last until someone else develops it secretly. All that is left then is ignorance.