"hummer" is too generic a term when discussing "hacking"...and "hacking" means different things to different people.
ESA 9162, 9164 : movement found in Omega f300, Tissot Tissonics, Longine Ultronuc etc. These will disconnect battery when crown pulled fully out
Accutron 214 : some hack (214H), some do not.. but none disconnect the battery
Accutron 218 : all hack but only some disconnect the battery (218F, 218G)
Obviously, if the battery is disconnected, the humming stops