[gowld]

> - Ability to require a full/proper login for guests (no hard-to-guess urls as security)

What is the difference between a hard to guess password and a hard-to-guess URL?

[gabagool]

Someone with a hard-to-guess URL could share the link with anyone else or just put it online, thereby eliminating any sense of security.

Of course, that "someone" could also just take a screenshot or copy the image.