I think it is possible for a person to change personality when he/she gets too attached on technology?
I'm a gamer and I prefer violent gore games when playing on my computer, I think that affected that way I speak and treat others in a more aggressive way and IT's really not a nice change.
I agree that it can change people for the worse but you would have to use a lot of technology everyday and have it be pervasive in your life to change this way. I doubt you have changed because of the games maybe you were already looking to speak more violently and ill of people but needed a reason to point to for the behavior.