Indeed.
When I butcher a cockerel, unless he's low bird in the group, his testicles are generally as big as his head.
(The white ovals, for people unfamiliar with them).
I wouldn't even give him the one change to show aggression. An aggressive rooster can maim, disfigure, or blind a child the very first time he strikes -- not to mention instilling a lifelong fear/dislike of chickens.
Correct.
Right now there is a near 100% chance that some nice cockerel is up...
This. I have several promising boys right now who are going through their hormonal stage without trouble who will probably be eaten since very few want to buy them.
I haven't had one go aggressive, but yes, that's how it is known to happen.
It is very rare that a cockerel that goes aggressive can ever be reformed. You may find some articles about ways people have tried, but ...
Do you have children or do children ever visit your home? When a rooster...
This is not promising.
A likely candidate for permanent keeper status would be stepping away from you and keeping his distance rather than coming at you.