A British court has ruled that London Mayor Boris Johnson acted within his authority when he banned an advertisement from city buses that suggested gays could be cured of their sexual orientation. A judge held that Johnson's action was “procedurally unfair” and that he “demonstrated a failure to consider the relevant issues.” But the judge said those factors were outweighed by the fact the ad could “cause grave offense” to gays and could increase the “risk of prejudice and homophobic attacks.”