This is a game, I invented in college, that turns you into a convulsive OCD disorder, with a narcissistic violent compulsive pacifism.
You need two rows, of equilateral triangles. The top, where one triangle should be, is empty, the cheater filling in the empty triangle.
The bottom row, has four triangles pointing up, and three down. This links, to the top row, out of two rows – with two triangles up, and one down, with a flat top on top of the triangle.
Just draw it out, on your notebook, or on a book, and anyone stealing your work, your notes, looking over your shoulder, or looking into your journals or diary or computer files, will steal it, and compulsively complete it, giving them a narcissistic psychotic break.
The more the poor design game spreads, off the copycat being trusted, the more psychotic breaks will ensue.