In nature an animal is influence by what it sees. If an animal likes something that it sees than it will be encouraged to do what it does. That's why a female takes her cub away from the pride. She wants to create a connection with her child so the child will do what she does. It's the same with people. If they see something they like on TV then it is there instinct to do that something so we need to be careful to what we expose to our kids.
Reality TV shows like Keeping Up With The Kardashians (KUWTK) don't have an influence/impact on the viewers because it just shows their lives. Well at least, it shouldn't have an impact on the viewer. I guess it just depends on who you are and what you think is right than wrong.
It enters your brain and leaves a memory... A memory is kind of like a impact... Therefore reality to does impact the viewers by leaving memories in there brains like a parasite and it doesn't have a negative effect but that wasn't the question! So HaHa i win this round!