In 2010, UX designer Harry Brignull noticed something troubling. Websites and apps were using carefully engineered interface tricks to make users do things they never intended. He coined the term dark patterns and began cataloguing them. Every trick exploited established psychological principles. They were not accidents. They were design choices (Brignull, 2010).
A dark pattern is not a bug. It is not bad design. It is design that weaponizes psychology against the user.
The most common patterns
- Confirmshaming. The decline button says “No thanks, I want to pay full price.” The opt-out is worded to make you feel cheap or foolish. You accept not because you want the offer, but because the alternative shames you.
- Forced continuity. A free trial ends. Your card is charged. There was no reminder. Canceling requires a phone call during business hours. The friction is the business model.
- Sneak into basket. You checkout. A warranty you never added is in your cart. A donation to a charity you never chose. You have to notice and remove each one. Most people do not.
- Hidden costs. The price was $49. On the final screen it is $49 plus $12 shipping, $5 handling, and $3 tax. You have filled out five forms. Your information is already entered. Backing out feels worse than paying.
- Roach motel. One click to sign up. Six pages to cancel. Retention offers. “Are you sure?” Hidden cancellation links. Getting out is the hard part.
- Misdirection. The green “Accept All” button glows. The “Manage Preferences” link is grey, tiny, and looks like plain text. You click the shiny one. That was the choice they wanted.
The psychology beneath
These patterns sit on psychology we already covered:
- Default bias. People do not change defaults. Make the exploitative option the default and the work is done.
- Friction as a weapon. Add steps to what you want to block. Remove steps from what you want to push. Users follow the path of least resistance.
- Loss framing. “I do not want to save” activates loss aversion. The wording frames the choice before you touch it.
- Sunk cost. You have filled five forms. Abandoning now feels like wasting effort. You pay to avoid that feeling.
Dark patterns do not break your will. They route around it.
Why this matters
- These are everywhere. Over 400 documented patterns. Every checkout. Every signup. Every newsletter.
- The EU and California now ban them. The tricks are becoming illegal because they worked too well.
- When a button shames you for declining, that feeling was manufactured. When cancellation needs a phone call, that friction was placed there.
- Every pixel is placed to extract, not to serve. You are not the customer. You are the product.
The button that shames you was tested. The friction that stops you was measured. None of it is accidental.