In your opinion, who's the worse villain?

Both. Who is to say that the man posing as the 14-year-old was not intending to lure other like-aged kids to do God knows what? On the flip side, a 20-year-old man attempting to take advantage of a 14-year-old girl (despite her turning out to be an older man) is just as guilty. It seems that they both were trying to lure children into bad situations. Good thing they found each other, however, shame on them both. God bless!