I always have roosters. Why? Simply because I like having roosters and now and then a hen will go broody and hatch some chicks (which I also like). I've had roosters that were nice, mean and anywhere in between. I've also had roosters that would defend their ladies and ones that would be the first to run for cover if there was a perceived threat. When it comes to protecting your hens, a secure coop is your best bet. A rooster may or may not do you any good and you have no way of knowing until he matures and is put in that situation. On top of that, IF he's willing to defend his flock, it will often be at the expense of his own life and then you have to start over with a new one. Basically, if you WANT a rooster then get one. If you don't want to hatch eggs and have no desire to get a rooster, then don't. The best way to keep your hens safe is by building them secure housing.