What's wrong with just playing games like Postal, Hatred, No More Heroes, Doom, Final Fight, Streets of Rage, and Grand Theft Auto, imagining everyone who you target is your bullies, and letting loose on the town?
Even Harris and Klebold of Columbine fame were proven to not just be betas but bullies themselves that couldn't fucking shoot a snail until next year and still would fucking miss. Video games don't make people violent- The bullshit of society's excesses do, and they're too afraid to admit it.
Don't play this fucking wussass shit.