frannyfresh ~ I don't believe by directly linking to your Shutterfly page that anyone can tamper w/your pictures (although you may want to right-click protect it so nobody can take your pictures). I'm looking at a friend's Shutterfly album right now and I can't do anything but look at the whole album or the slideshow. There is a spot where you can check if you want to order a print, but I believe that can be disabled too.
BTW, I don't see a link in your sig, but from what you wrote, it sounds like you did it correctly. In Shutterfly, make sure you are copying the link that you would share w/your friends and not the link that is in your address bar at the top of your screen. It will end with .jpg or something like that.
HTH

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