A strong, thinking player will never take things at face value. If you show him a bluff, he will not think "this player always bluffs", and you're playing a dangerous game assuming that he will. He is more likely to think about the thinking behind you showing the bluff ("Is he showing me this to set up a play in the future? Let's make a note...").
A stupid player will be too busy wondering whether 52s is a good hand to play UTG to even consider the cards you've just shown. You'd be giving him too much credit by trying to set delayed traps on him.
Remember, at a full table there will be 9 other players. Even if you're trying to set a play up on one particular player (he may be prone to tilt and you're trying to push him over the edge or something), by showing you are also giving the 8 other players at the table the same information. Are they all going to react in the same way to your (mis)information? I'd suggest not.