[tsimionescu]

You can't outsource your ethics to 'business'. Is it ethical to build UAVs for the military? If you feel the answer is yes, no problem. But if for your the answer is no, but the company you work for is selling just that, then you have a problem - you can try to address it by lobbying your company, by ignoring it, or by quitting. But it is your problem.

I'm not trying to say that you should believe one way or another, I just take issue with the idea that, as an engineer, one should feel no responsibility even in principle for the way the product they create will be used.