Lawsuit argues Amazon illegally surveilled NYC customers including tracking their body size. Here's why Amazon Go stores are watching you.

• Amazon Go stores, which have no cashiers, use a system of cameras and tech to track customers.
• A new lawsuit alleges the company's stores in New York City illegally collect data on customers' size and shape without telling them.
• A lawyer on the case said he hopes the lawsuit catches the attention of local and federal government. 

Customers at Amazon Go stores are tracked using a system of cameras, sensors, and motion detection software to create a shopping experience free from cashiers and checkout lines — but a new lawsuit is arguing that the company never really told New York City customers that they're being surveilled.