So I was trying to send a colleague the files for a simple HTML page and decided to just throw it into my Dropbox Public Folder in case he loses it. When I went for the Public Link I noticed that the index page did not download but showed up in the browser.It did show anything though as the links were wrong obviously so I decided to see how far I can push and try to link the files back through the public links. This is the result. Is it wrong to use the public folder in this way? And if not, how far can I go with it in terms of HTML pages?
Dropbox Public Folder and HTML previews
dropbox
I think this is fine if you are only testing something for a few friends.  However, there is an issue with using too much bandwidth if you try to host something through your public folder that becomes too popular.  As per https://www.dropbox.com/help/45:There are currently no hard limits on  public bandwidth usage. We do,  however, have an automated system for  detecting and flagging unusual amounts  of bandwidth usage. We will send an  email notification whenever an account  is flagged. Once flagged, public links  will be temporarily disabled and users  who use the links will see an error  page instead of your file.