Video games aren't going to give you a good sense of right and wrong.
In fact, according to a recent study, they'll do the exactly the opposite; they'll blur the lines. Researchers at Brock University in Ontario studied the behavior of about 100 individuals aged 13 or 14, and the conclusion was as follows, as reported by the BBC :
Those who spend most of their time playing violent games "could experience weakened empathy" for other people. They might also lose any sense of right and wrong, which is a very serious issue for developing individuals. For the record, a "violent game" was defined as any title where the player kills or causes serious physical harm to another human character. Non-violent games were titles like Rock Band and Mario .
The study found that teens who played violent games for more than three hours a day were more likely to experience a lack of "moral maturity." However, it's important to note that this study is only correlational, in that it's not designed to prove anything. It was also admitted that other factors typically come into play; i.e., cognitive abilities, social relationships, socioeconomic status, etc.
So, what's your take?