Vince,

 

If you give someone your gallery direct link that is at the bottom of your gallery page, they do not get logged in as you. I just double checked it by logging out, copying and pasting your URL and getting to your direct gallery, I was a visitor the whole time. You can't "browse" the main galleries without being a member but you can go to direct galleries with the correct link. They can see all your full images as well.

 

Hope this helps

Thanks