Indeed movies shape our lifestyle. Movies are good sources from which you may know what's new, what's going on right now and what people expect in the near future.
These days, movies are in fact a great media for cultural mixture. You can imagine how much movies (mostly western) have shaped our lives. For example, ask yourself what you think about people who are living-together without marriage (There are people who would say, it's okay, it's 21st century, dude !). Or, what do you think about the young lady with a very short dress who just passed you in the way (You'll definitely think she's hot! Even I would

)
Now, 5/10 years before, did you think like this ? I know peoples' mind changes with time, peoples' perception changes. But the bottom line is, movies can change your perception, your views. After you have watched few movies of same kind, your perception about good and bad would be pretty much what those movies told you.
Now, lets talk about if this change is good or bad. Some of these changes are good and some of these changes are bad. But you have to be picky enough to take the good sides only. Again, the definition for good and bad varies from person to person and it is you who has to set the limit.
Alright, I don't want to extend my lecture any more. Its adios from CP now.