In our house, we were duped by the fun and seemingly lightheartedness of the Disney channel's lineup of family comedies. The favorite in our house was "Good Luck, Charlie." Like many other Disney shows, the kids are brilliant and clever and their parents, particularly the dads are complete morons.
As a family, we laughed together at the light-hearted comedy. We were thankful that there was something on the TV to watch. But over the course of a month or so we saw a change happen in our kids. They began to mimic the kids on the show and slowly, but surely, we, parents were the idiots. And, just like that, the Disney channel is off the air in our house. :)
This is a light-hearted example, but one that has deep ramifications. Think of the people you look up to and admire. Without even realizing it, your life has begun to mirror theirs. If you are not aware of that, both the good and the bad of that person will begin to infiltrate your thinking and your world view.
Where this goes off the rails is when we admire, even worship others uncritically. Scripture reveals to us that when we worship created things rather than the creator our hearts get hard and our thinking becomes futile and we actually become fools.