The first time my rooster growled at me it scared the crap out of me. It was after dark and I was closing up. Gosh it was a scary sound.
I had a rooster do exactly what you are describing and it did turn into attacks towards me. He was fine with my husband, my kids and strangers, but it was a daily battle with him. I'm not saying your rooster will do this too, but just be cautious.
I would definitely suggest you keep an eye on him, especially around your kids. If he has sharp spurs, you can dull them down. Trust me, puncture wounds hurt really bad - even when you get them through jeans. Also, I have been hit as high as my hips by this rooster, and I'm 5'8". That is face level for a child. It happens lightening fast.
Needless to say, he's not around anymore.
You tellin' me I talk too much? Eh?
In my defense, I have Staff stuff that contributes to my post count.