Thanks Jack, I'll check out the privacy settings.
I don't think it's necessary that a viewer be able to scroll through other photos when I hotlink to one, just to answer your question.
Glenn, thanks for your input. Controlling resolution on image click is one reason i want to move to Flickr. Photobucket used to respect my posted resolution. It doesn't seem to be any longer. I may be wrong about that, though. Like you, I like the way a single click on the "plus" icon in a flickr hotlink displays the chosen image resolution for the viewer. We're on the same page there.
Hopefully I'll get this sorted today.