Much criticism has been leveled at the IoT concept regarding privacy, security, and other ethical concerns. This isn't surprising, given these devices' pervasive presence in our lives.
Most IoT devices work in conjunction with a central server. This server gets essentially all of the collected data from the IoT devices it services. This raises questions about data ownership and privacy.
Many IoT devices collect lots of data as part of their operation. For example, a smart thermostat collects temperature data about its environment. This is required for it to function. This data may seem harmless at first glance, but once you consider how people use smart thermostats, you realize that the data is more important than it first appears.
In the smart thermostat example, people will set different temperatures based on when they expect to be awake, asleep, or away. From this data, you can infer approximately at what time someone leaves for work in the morning...