Deathmatches can be unfair in it, thanks to custom created content. I remember trying to go kill someone, and they modded their gun to do 999 damage, and had several bullets per shot. My computer crashed after that.
Me and a friend created a remote-detonated sim DDOS'er. It spawned a crate, duplicated itself in a grid pattern across the entire sim, then emitted physics objects and particles.
That might be one reason I'm hardware banned.