logical flaws

Rating: 4/10 (15 October 2012)

I am not a fan of the movies based on the concept of time travel. A main reason is that the idea of time travel in itself is based on a logical flaw. This movie starts with scenes where the main character is in a cornfield, and shoots a guy that pops out of nowhere. And it is explained that this is people from the future, that is sent back in time to get shot.
I began to wonder if I would see a story that would explain this as logical. Why would it be so difficult to kill a person in the future? If people could in the future invent a time machine, wouldn't it also be probable that they could invent a machine that could, for example, instantly vaporize people (and kill people that way)? I experienced the movie as just creating more and more logical flaws, ending with a so massive logical flaw, that -i thought to myself: the writer must have just given up.