If there was one broad takeaway from the data leak involving Cambridge Analytica, the voter profiling firm that obtained private information from up to 87 million Facebook accounts, it’s that you should hesitate before sharing your data with an unknown brand.

This lesson applies to just about everything that touches your personal technology, including the apps that you download to your phone or computer and the free online services that you use. And, yes, it also includes those seemingly harmless personality tests run by some unfamiliar organization on Facebook — the kind that helped Cambridge Analytica get the data on users.

To make matters worse, the information that can be stolen from you is becoming increasingly personal. Smartphones, for one, are embedded with microphones, motion sensors and cameras that can spy on your every move if corrupted by a bad actor. Home gadgets like internet-connected thermostats, power outlets and audio speakers are capable of collecting information about what you are doing at home, including listening to your conversations, and knowing when you are away from home.

It’s time to stop using technology and the internet as though you were shopping at a supermarket. In a grocery store, you can reasonably assume that the food labels are accurate and the products safe to eat, because the food industry is heavily regulated. The handling of personal digital information, in contrast, is loosely regulated. There have been scores of obscure companies baiting you with products that purport to improve your life — but actually capitalize on your data.