What do you think about the use of technology?

So I read this article about an early version of a cloaking device. I tell my room mate this and he immediately says “that’s one of those things that you just have to walk away from.” I told him it would be cool if soldiers could use it to cloak themselves in battle, and it could be of great benefit to us. He went on to say that it would be too dangerous if it got into the wrong hands, and they [our enemies] would use it against us. He said we created nuclear bombs, used it (WWII), and now everyone is getting one. He also said it would have been better if it had never been created.

What do you think about new technology? Is it bad to create new technology, because you fear someone will use it to do bad things? What do you think about my room mate’s opinion about terrorists getting their hands on any new tech we create?

I have never met anyone who would oppose the creation of new technology because of paranoia; I have always read/heard/assumed that tech was always good because it advances a civilization. Have you ever experienced people like this? What type of people are they?

I’ve asked many questions, both ethical and psychological. Answer which ever you have most experience with, but not only am I interested in your opinions about the ethical part, I’m also interested in the thought process/personality of my roomie and others like him.