Three years ago, I invited someone, an acquaintance, to look at photos in a dotphoto.com album of mine. I see that they have visited my albums many times since without my invitation, which makes me uncomfortable. I would like to block them from further visits. How is that possible?

You can put a guest password on the album if there isn't one already or you can change it. You can also put a guest password on your entire account if you want to block everything.

Thanks. But what you are saying is, in order to police against one person, I must put passwords that apply to everyone -- is there no other way that is less intrusive?