I added a good site dealing with Dark Patterns in Games to the top post.
And I have a nice Dark Pattern I found in LinkedIn: Not only is your profile not top-notch if you do not specify your location data.. but the indicator dot is displayed lower on the progress bar, than where the actual level of progress stands. This to add extra psychological pressure to add this info. The progress bar will always be shown in the top of your profile, until you decide to give LinkedIn the data they want (which you might do, just to get rid of that bar).
