Double standard in art world

When Marcel Duchamp disfigured a perfectly serviceable piece of gentlemen's porcelain by signing and dating it (Fountain, 1917), gullible art critics were gobsmacked by his genius. When a 12-year-old boy recently visited the Detroit Institute of Arts with a school group from the Holly Academy and stuck a piece of chewing gum on an abstract painting by American artist Helen Frankenthaler (The Bay, 1963), he got suspended! Where's the justice in this?
Next time, son, stick your gum on the wall and sign it and date it. Then the art world will recognize your genius.