Come on, people! This has been the ONLY attack soo far, and only since he's been crowing...... meaning the 'rooster' is still pretty young and just started to get into his hormonal stage. At this point in their life they are unaware of their actions and act out accordingly to what roosters do, which is to attack and defend any new comers into his property. It's NORMAL. With time, the rooster will learn that humans are not their to harm them and learn to accept their presence, but of course some training before his attacks gets outta hand is the best solution to preventing it. But to say cull and get rid of him for coming into adulthood and testing boundaries? That's just ridiculous as far as I'm concern. My advice would be to teach him to behave, it is paramount as he starts growing into an adult rooster..... I prefer the 'buddy buddy' method, meaning to be more of a friend than foe with the rooster, he will soon learn you are not a threat and doesn't see you as such. With people who prefer the bully method and trying to dominate the rooster..... it probably will work for the majority of time, but you can always be assure that he sees you as a threat which means there is always a chance of him attacking. With the friend method there is zero percent chance of him seeing you as a threat, therefor very very little chance of you getting spurred, given he's 100% committed to being a 'friend' with you. It's your choice how you will proceed with this, and of course nothing is guaranteed as every chicken behaves differently.
Sure, if there were only adults around the cockerel one could try to train the bird to not attack people. However, there are children involved. A child has a face that is well within jumping distance of a cockerel. A child will not react as quickly as an adult to something jumping up at its face. I put the well being of a child above keeping an aggressive bird.
How soon is soon with that buddy buddy method you talk about? I tried something like it for 6 weeks. Did not make one little bit of difference to his aggression. Would you really be willing to put a child at risk for weeks or months while this buddy buddy method is attempted? I am not.