We've been using MB Classic for years now (probably since your first launch) - it's great and I can't thank you enough!!
But... our little girl is growing up - and now frequently using the computer. So I'd like to protect her from accessing age-inappropriate films/tv.
User control is "ok" and very beneficial for access from remote computers - I often stream on my Windows Phone on the train, or to my laptop when away. On a local network you know who will be using the machines and so can now allow local access without a password (great addition, with caveats...).
However, what many parents (I'm sure?) will want/use users for is to prevent their kids (of whatever age) accessing age-inappropriate material, therefore disabling passwords is not very helpful as they could simply select a different user.
Would it be possible to add a basic, optional, "PIN entry" feature for content that is above an age-rating that you specify in the configuration?
There could be a toggle for this in the top "options" (?) menu (that is shown in the top-right corner of all front-end pages)...
e.g. by default a specified PIN must be entered to view any content rated above the set age rating.
You can enter the PIN and enable all media until you then toggle the "parental access" back off again. Ideally, a time-out could be attached to this - so, once the kids have gone to bed, you enter the PIN once and have access to all content for the rest of the evening - but, after say 3 hours/overnight, the PIN times out and content is limited again.
This would just be a much simpler (and much faster) option than logging out and in as a different user. It also means that you can simply leave your HTPC on and everything works - with no fear that your children can access 24, True Blood or a violent film for example.