Time travel

Ironically, movies like Lake House, Frequency, Time machine, Back to the future, etc make me wonder if time travel will be possible at any point of time in future. While watching these movies, I keep guessing what will happen to the whole system as a consequence of the changes brought in due to time travel. Generally, the script writers are able to justify the alterations due to the time travel, but this is limited to only central part of the script. What should be realized is that once time travel happens, the surroundings will become much more dynamic than what is shown in these films. Even an infinitesimal change in the system will have a metamorphosing effect on the surroundings and this is not depicted in script. It is not that this is not thought about; the actual problem is that these effects are so burgeoning, penetrating and omnipresent that it is simply not possible to think about even a percent of them and further present them. I remember reading a story about time travel in class VIII, in my English course book. The story talks about a time in future when time travel is possible and is available to commons. A group of people travel to past, when dinosaurs existed. The company which organized these trips had, somehow, laid a pavement to keep the tourists approximately 6 inches above ground to avoid any contact between the humans and the surrounding in the past. This was done as the significance of an infinitesimal alteration on future was adequately understood. In the story, one of the people accidentally steps on the grounds and kills a small organism. The group leader frowns on him for doing that and asks them to stick to their plan of hunting a Dinosaur!!!!!!!!!!
When they return to the future, they find that everything has changed. Quite amusingly, one of the changes was that the spellings were changed everywhere. I could not understand that how can an organism have such an effect on language and much more unconvincing was that only spellings were changed, alphabets were all same. But let’s not go into that. Why I brought this here was to highlight the fact that the surrounding will become much more dynamic once time travel happens. Just imagine a world equipped with time travel. Time travel in one corner of the world will have huge effects on the other. Imagine this, you wake up at 6 AM and go to pee while, simultaneously a person, in other part of the world and completely unrelated to you, goes back to the past . Due to his travel, there are alterations in past and somehow, directly or indirectly these alterations result in elimination of the bog from the past and in present. So at 6:00:01, you may end up standing on a highway or a theatre or a restaurant or somewhere, anywhere……and definitely peeing. While you come in terms with the reality, someone else will board a flight to past and you will be again taken for a ride. These rides will go on and on, each time someone alters the past.
We can’t even imagine what it will be like living in such a world but it is definitely fun pondering over it.