Trick questions are a common dark pattern. Some products use confusing language to compel users into buying or subscribing to something they don't want.

For example, it may seem that a checkbox offers to subscribe users to something. The bet is that users will skim the text and make a wrong assumption. In reality, the copy might offer users the option to NOT subscribe, but since they didn't check the box, they will end up being subscribed against their wishes.

Tricking customers into buying or subscribing to your product won't make them happy, and it can hurt your business in the long term. Using clear and straightforward language builds trust. Always avoid intricate word combinations and double negatives. Instead, use clear copy so that users can understand what exactly they are signing up for.