In this video, illegal Lego is identified and explained. It's not cheap knockoffs at hand, but supposedly inappropriate building methods and techniques. You may not be arrested by the Lego police for your unconventional builds, but the shame… overwhelms.
People called my builds illegal… I took it personally and made this video! And you for the record, I should know a thing or two about the subject since I was a former designer [at] some point in my life.