Well I see what they are saying a little bit. People could start using the tag for every type of post if they see it get traction. Kind of like taging a youtube video with "Tai Lopez" because you know he has traction and it is business related.

There is the potential to setup a channel in Steemit.chat as well.

As far as featuring someone I would say doing it through a post would probably be the best way. It is a tough thing to figure out exactly what route to take because you want to get the post seen but as you might know a lot of posts have a very quick life cycle on here especially early on when you are newer. But even a little traction for someone can go a long way and just the fact that you featured them can make them really feel good even if the post doesn't initially get a huge payout.