OK, I'll bite. The tough part is that this is Hacker News, not Start-up News, much less Idealist News, etc. This probably isn't the right forum for evaluating a social/community ventures. Many people here have a deep understanding of how to start a business and make money, but not everyone knows how to address gaps in society (for lack of a better way of putting it).

Hacker News is many things to many people (I'm not in the start-up world right now myself) but it can't be everything to everyone.

Please don't take this or the (lack of) responses in some threads as a snub to the many ideas for improving society - I'm sure many of us have had and continue to have ideas for improving the world around us.

As for the title tag idea, hmm. Sure, why not give it a shot? I don't know that it hurts. Just know this may not be the best forum.