Wayne is right, if they are looking to see something that has links to the Gallery, then they need to register. I never gave that aspect much thought before this though. Thanks for picking that up.
If you look through the members list, you can sort by any column. For instance, if you click on "posts", it will sort by the number of posts starting with the lowest count (0) first. Click again and it will sort from the highest count first. You will see that we have a few hundred "members" that have never posted. Click on, "last activity" and sort by oldest first (-) and you'll find that there are some 74 members that have not been back ever after completing their registration. Some of those never even completed the registration process by acknowledging their initial registration. I don't think you can tell by that list who has or hasn't done that, but Mikey and I can access that list and there are occasionally a few. Then there are those that do register and are visiting even months later, but only lurk. You can see that by this list. They must either log on each time, or have asked to be remembered.
Then there are those that complete their registration quickly, dump their garbage and leave, usually in the middle of the night. I guess you can say they work the night sift, or live in a part of the world that's maybe 12 hours difference from us. They are usually dispatched quickly though.
Mikey found that site "stop forum spam" and so we frequently check the user name and email address against that list, and if we get a hit, they are immediately banned. Sometimes it's a bit of work, but when you ban someone before they post, that's enough satisfaction to make it all worth while.
A couple of the more impatient types were quite irate, taking it to the point of complaining within the thread. That's when I added the "if you want to see the pictures, you'll need to register". 