Some thoughts to consider!
There hasn't been any scientific proof that video games influence violence, for reference it may be noteworthy to research Jack Thompson and his attempts at destroying the industry, he's a joke among the community but probably the best outcome of his career was that he actually proved games
don't cause violence (kinda the opposite of what he intended).
The biggest accusations against games (specifically with the school shooting cases) was that games can teach you/train you to handle things physically and mentally better than someone else. For example you can learn how to point, shoot and reload a gun, if there's an accurate presentation of someone making a bomb within a video game, the player will know themselves how to do so in real life. So that's true, but games have a lot of fallacies too, you don't kill real people in FPS, you don't experience realistic recoil, fear, anxiety etc. Respawns are unrealistic, things like that immediately help us detach the game world from the real world without even being aware of it.
Additionally, games also compound consequences on the player. GTA for example, free roaming god like experience? Nope, do something bad and there's a penalty. We may enjoy doing it since the penalty isn't real, but it's still subconciously teaching us stealing a car or shooting someone is wrong, in fact it's because of that penalty that the game escaped a lot of charges in the past.
Violence amongst teenagers has actually reduced since the 1990s, around the time the gaming indsutry came into it's own after the late 80s collapse.
Kierkegaard said:
For
example, in 2005, there were 1,360,088 violent crimes reported in the USA compared with 1,423,677 the year before. "With millions of sales of violent games, the world should be seeing an epidemic of violence," he says, "Instead, violence has declined."
Source is two years old but his point still stands, video games become more realistic and more graphic each year, if video games really did influence violence by this point the world would surely be in chaos.
Actually (though my memory is vague) one of the counter points to a Jack Thompson case was that gamers are actually inside more often, rather than out on the streets, lowering the crime rate. So yeah, venting whatever teenage frustrations you have on a video game is win-win, feel better and no jail time.
I also disagree that video games desensitise players, though it would vary greatly player to player. If anything they help us empathise more with the characters, you could even argue they help people appreciate life when they sit through a graphic war game (hi2u MW2 "No Russian"). They also help breed inspiration and creativity, since games too are a form of art.
In conclusion movies have been depicting violence among other things for far longer than games have, video games actually maintain a bridge between reality and the game world reminding you it's not real.
So no :p