Depends on how much you consume. I believe everything we watch, hear, touch, read, and think about is a source of fuel for us. If all we do is watch TV and movies then yes we are impacted heavily by it. Just like if all we did was play video games then we'd be impacted by the video games. Some sources of fuel are harmless in small quantities but hazardous in large quantities. So things like watching a movie once a month probably won't have much of an effect. Watching every movie that comes out 4 times in the theater and 2 times when it hits DVD then yeah we probably would be impacted.
@JCS just because its not rational doesn't mean movies don't impact us
. Heck growing up I was reading Jurassic Park and I had to finish the dang book before I could sleep. I got halfway through by 12:00am and tried to sleep but I was so spooked I had to finish it before I could sleep. I personally think that alot of this ties into our talents and how we receive different things. That is a conversation for another time and place though.