Technology attacks

Its kind of scary that we are so reliant on technology; one small glitch in the system or technology failure and our technology world could be changed.  This kind of reminded me of the Terminator movies.  Robots are used to bring the world's technological world down causing the communication system to fail.  This brings a weakness upon earth because without communication, it is hard to organize a defensive attack.  I could see this happening with our own technology.  If we create robots to act and even be as smart at humans, they could easily be a threat to us.  I don't know about you guys, but it kind of scares me that we are looking into creating robots to be human like.  Because we are so dependent on technology for communication, we have not practiced other ways of communicating as much.  I can see the huge dependence on technology possibly being destructive in the future.