Hey @Rusty Wingnut, I'd be happy to help!
The best way to go on about this, and share content with non-Dropbox users are shared links.
Shared links don't require the viewer to have a Dropbox account, and can usually view, and download the content.
It's currently not possible for a signed-out user or user without an account to leave a comment on a Dropbox file. Signed out users may see the comment pane, but attempting to leave a comment will result in a prompt to sign-in or create an account.
There are also some can-edit permissions with shared links, but that would require a Dropbox account.
If you wish to share a folder or file directly, the user you're sharing with needs a Dropbox account, and the space to accommodate it.
I hope this clarifies! If you have any questions, let me know!
