Why not? It worked on 'Dexter'. You think Freddy stalked, abducted, raped, and murdered 20+ kids without getting caught by behaving like a raving loony all the time? Fuck no! He took steps to blend into the community. Be the 'nice, quiet guy down the street who wouldn't hurt a fly'. Maybe he even joined the search parties, looking for missing kids that he knew they would never find. I think this video shows that very well.