The only unfortunate thing about them is that, whereas people "say it with flowers", raccoons "say it with poop". Many's the time I've had to go out with a trowel to scoop a raccoon message off my deck, bird table, or planter box. I know that the message on the planter box means, "I just got pricked by your spiny cactus and I didn't like it." On the bird table, it means, "When the food arrives, it's mine." On the deck, "I was here!"