A "sidebar" function


I’m not a developer, but didn’t really know where else to ask this question.
Please understand that I think a wizard lives in my computer and much of what happens is magic so
bear with me:

Many celebrities (and regular folk) will DM followers who then, must answer them via a public timeline.
I think it would be cool to have a “sidebar” that wouldn’t appear in the public timeline and also would
take the onus off of the celeb or followee, if you will, to follow the person for the exchange.
Given that the celeb or followee might have thousands of followers, there would be a cap
on how many sidebars allowed per hour so they wouldn’t have a ton of “sidebars” to contend with…

Does this make any sense?
It wouldn’t be a chat- it would just be a “sidebar”. Everyone would have the capability, however
there would be a nice little cap on it to prevent mayhem.

Let me know what you think, but please be kind.