"Smart ovens have been turning on overnight and preheating to 400 degrees": https://www.theverge.com/2019/8/14/20802774/june-smart-oven-remote-preheat-update-user-error
Note the manufacturer's response: must be user error.
Bzzzzt.
A high-heat appliance turning on unattended is a big safety problem: fires start that way. If your user interface is such that multiple users are having that happen, it isn't the user that's at fault, it's your shitty user interface.