If any alien life form has the technology to even get here, then they are vastly more advanced than we are and we couldn’t possibly deal with them.
Yup. They could kill us all simply by dropping rocks on us.
You may give it some thought that we may live in a multi dimensional universe, in other words these so called unidentified objects really don’t have to travel great distances but have acquired the knowledge and technology to jump from one dimension to another within the blink of an eye. Another reason why quite often we may see one and all of a sudden it disappeared just as quickly. Just because we do not understand this process, at least not yet, doesn’t mean it is not possible.
Probably their technology is so far advanced that very few of us could fathom it and at the same time would turn many religious believes upside down what probably is the reason that some people who recognize what appears to behind all these phenomena’s indicate that many people just could not handle it. It would be comparable if we go back just hundred-and-fifty years and attempt to explain that before long we will be able to talk to some one on a hand held device at the other side of the globe and see his picture as well. People most likely will assume that you are crazy.
The same goes for being able to fly, as a little over a hundred years we were not even able to get off the ground. In reality I do believe that when it comes to technology humanity has barely scratched the surface and there is much, much more on its way that is if humanity doesn’t self destruct before then.