In fact, if you just know the programmer you can do something nice. But for that, you have to be realistic. There is nothing that can not be, you just have to work.
Any program on Steemit can be set up. All kinds of application works.
Partiko application on Steemit is super. Solves many problems. UpVote was the biggest problem.
It's possible but the main issue probably would be the users RC assuming each message consumes RC it could frustrate users with low sp and deplete their ability to interact in the chain for a while.