SCP-2041
A merry-go-round that shows its riders a hallucination where the world goes cartoony. The trees dance, the sun has a smily-face on it, and it shows most people unchanged. Except pedos. Pedos look progressively more menacing and are color coded in shades from yellow to red representative of the severity of their crimes. The trees even stop dancing and the sun frowns.
Whoever designed this thing was a genius.