I just found out that the father of my eggs (A barred rock) ended up in the freezer after attacking a 4 year old. He's always been very aggressive, but this is his first attack on record.
I talked to a guy who breeds chickens. If he sees any behavior that he does not want in his flock, he immediately culls the bird. He told me that he believes it is his responsibility only to pass on genetics of those birds with superior quality and behavior.
Obviously, his bar is set very high for his birds. But I would imagine that chicks from an agressive rooster might be more likely than not to also be aggressive. So I would not consider them for breeding and I would be willing to cull them if needed. I would not put up with any chicken that was aggressive to me or others. So, if they turn out to be the sweetest chickens you ever had, then I would say you were very lucky and I hope you enjoy them.