It depends what movies are playing. There is plenty of objectionable content in movies today: sex outside marriage, violence, abusive behavior—just to name a few. We do well to keep our distance from such “entertainment.” Scripture clearly teaches that sinful thoughts are every much deserving of God’s condemnation as sinful words and actions (Matthew 5:21-22, 28; 1 John 3:15).
Because what we read and watch and listen to affects us, there is good reason to implement this biblical instruction: “Finally, brothers and sisters, whatever is true, whatever is noble, whatever is right, whatever is pure, whatever is lovely, whatever is admirable—if anything is excellent or praiseworthy—think about such things” (Philippians 4:8).
Condemning and banning all theater-going puts all movies into the same category. That is not an accurate assessment and is an attack on Christian freedom.