Any invading alien species might have the technology to kick Homo sapiens ass. They might be so far ahead of us that it might be a cake walk. But what they will not be able to do is take us by surprise.
What with all the recent monster alien flicks and TV series of the last 30 years culminating in the intriguing ‘Attack the block‘, aliens will find a human race conditioned to believe that they EXIST and do not have our best intentions at heart. At the drop of a hat, we will all agree generally that we’re being invaded (thanks Twitter!) and move quickly to the “what to do about it” phase of operations, stat.