Proverbs 13:20 (ESV)

20 Whoever walks with the wise becomes wise, but the companion of fools will suffer harm.

To walk is not to be strolling down the road but it is a way of living life. The life a person lives will be demonstrated by the people with whom they associate.  Those with whom they spend time will influence the way they think, act, speak and behave. To walk with people who are godly and live to please God is to associate with the wise and imitate their way of living. By being in their company and learning from them one will become wiser and therefore live wisely. The way of the fool is to reject God and live in folly.  To be a companion of a fool is to follow their lifestyle and be influenced by their way of living. The person who chooses to spend time with a fool will bring harm upon himself, which can be both earthly and eternal. 

This verse applies to what we read or watch on the TV. To read often from the book of Proverbs is one way in which we can walk with the wise. But “bad company corrupts good character” (1 Corinthians 5:13).