I may have a minority position on that, but if you don't want broodies just buy a non-broody breed, don't toture your hens for beeing what they are.
Hearing about breaking broodies is like a a deja vu only this time it is hens, not bitches or female cat in heat.
About 30 years ago the spaying and neuter campaine was in baby shoes here in germany, people told me that they don't want to spay or neuter and that they don't need it b/c they could "handle" a pet in heat by dumping them into cold water, locking them up alone in the dark, or starve them til they "give in". We had to take a dog into care whos owner thought it would be a great idea .to handle the heat by putting a truck load of antiperspirant and cologne on the dogs bum with the result that the poor girl had septic vulva. In his defence he told the Veterinary Office that he and everyone he know did it this way and that this dog just was a little subborn so he maybe over did it and he wanted his dog back asap b/c he didn't do any real harm to the dog....
I realy don't want to know what real harm could be in his case.