If you handle a rooster that is not acting aggressively, you may inadvertently encourage him to be that way. The more you handle him, the less fearful of you he will be, and the more likely to attack.
I have several roosters who mate their hens when I am feeding/watering, and have never tried to attack. They are all various kinds of Orpington, and I have never had an aggressive one.
Penning cockerels up for being 'rough' is again a bad idea. Nearly all calm down once they grow up a little, penning them up will result in higher testoterone levels, frustration and more than likely aggression.
I have several roosters who mate their hens when I am feeding/watering, and have never tried to attack. They are all various kinds of Orpington, and I have never had an aggressive one.
Penning cockerels up for being 'rough' is again a bad idea. Nearly all calm down once they grow up a little, penning them up will result in higher testoterone levels, frustration and more than likely aggression.