Is it possible to overdose on oysters?

Captain Woody's restaurant is just down the road from our RV park, and tonight they celebrated the start of tourist season with a big ol' Oyster Roast.  (They don't really roast the oysters, they steam them, but "Oyster Steam" doesn't sounds as good.)  I learned that steaming is a quick way to kill the oysters, making it easier to open the shell while leaving the oyster meat raw.  That bit about being "easier to open" is important, because after you hand over $10, they give you a bucket full of oysters, all of which are still snug in their shells.  Well, we've had a little experience at shucking oysters.  The first time was in 2010 in Tillamook, but just a few days ago we bought some fresh oysters in Bluffton, so we were in good practice. But oysters don't like to be opened and they make it as difficult as possible.  And even after they are steamed, they don't just pop open.  You still need an oyster knife, some strong wrist muscles and a little patience to get the job done.  But oh, when the shell gives a little and you know that oyster is just about yours, what a wonderful feeling!