Whether online gaming is bad for teens -- as many believe -- or actually maybe not so bad -- as others believe -- the one "take-it-to-the-bank" is that gaming has become a huge part of the entertainment industry and is not likely to go away anytime soon. And yes, some parents are concerned. A recent Common Sense study found that tech use is a primary cause of conflict between them and their gaming teenagers. Of the 1,200 study participants (both parents and teens), 59 percent of the parents believe that their teenagers were "addicted to their mobile devices." One-third of parents say they argue with their kids on a daily basis about device use, the study said.