Yes. I think if you spend too much time on your hobbies, it can affect other aspects of your life. For example, if one of your hobbies is playing games, and you spend hours playing Plants vs. Zombies or Angry Birds, then you will have little time for your studies and your social life. Another example is if you love watching movies, and after a hard day at work, instead of doing exercise, you spend all evening watching your favourite films, which is really harmful to your health. So, I think whether a hobby has negative effects or not depends on how we spend time doing it.
