Time Travel Laws would be an interesting concept, but somebody would surely find a way to break them.
If you've ever seen the new version of The Time Machine, it uses the idea that the past can only be changed in ways that won't affect the future in anyway to prevent the time traveler from eventually traveling back. Meaning that whatever motivates the time traveler can't be changed, cause he has to have a reason to travel back. It doesn't really make much sense if you think hard about it though. Of course, there could also be multiple dimensions/timelines, such that everytime you change the past, you create a breakaway point where 2 timelines seperate ala Back to the Future 2.
It all sounds to chaotic for me, so I personally don't think time travel backward is possible, although I definitely think future travel in many forms does and will exist. Also, it is interesting to note that movies never know what they're talking about, so why would they start knowing now?
