Well, the presentation is private by default. It would be hard to associate that data with you without a sign-up (I guess unique URLS would be an option). I als

Well, the presentation is private by default. It would be hard to associate that data with you without a sign-up (I guess unique URLS would be an option). I also made it for myself to use in the first instance, and having some kind of login worked well for me! The user authentication uses a fairly mature package that follows good practices (e.g. passwords not stored in clear text).