4 Answers

Yes!  It's bad for your future life and bad for your present life. Get outside! Get involved! Take up an interest away from that computer!  Do it right away.

Yes, for many reasons.

When you are young, you should be concentrating on school work.

You should also be out socializing with your friends, not locked

in your room playing vids.

Also, the more violent ones, which many kids seem to choose

are very bad for your brain.

Garbage in...garbage out.

Sure it is, time wasted on this should be used for things which you should be developing at this time of your education for life.  For example, are you getting straight A's in all of your subjects?  Do you regularly read a book?  Do you have normal social skills, such as oral and  written communication skills?  Do you interact with others, or are you more comfortable alone?  Do you have interests or hobbies?  Do you have any work-skills?  All of these are things that are normally achieved during your adolescence and you may not be doing these, which will leave you ill equipped for life!  Drop the joy stick and get on the right track before it is too late.  I for one, do not need to support you, if you fail to prepare to make your own way in the world! 

Adam Lanza supposed Sandy Hook School killer was a computer games player; not necessarily a connection to his crime but you should limit your time on the computer, get out more, play sport, learn to make things, read books, ride a bike, etc.