Agree. The only nasty rooster I have ever encountered was the sweetest thing as a chick..... I now have some cockerels that I believe have potential to be aggressive; and I am taking great pains to not be friendly with them. So far, so good.
My current flock rooster wasn't all that friendly as...
Prevention is the best cure. Bad roosters taste good.
Edited March 2019: I'll expound on "prevention" a bit here.
https://www.backyardchickens.com/articles/a-viewpoint-on-raising-cockerels.74690/