"Starting with NASCAR’s Pocono 400 race, which will air on TNT, Twitter will be curating #NASCAR to capture the buzz around the game".
Curate...smurate people want to say what they've got to say and not have it moderated. Closed walled gardens are great for kindergarden but the internet wants to be free which is why moderation is controlled by the end user at sites like http://www.livenascarchat.com/
If you dont want to see someones message you just block them personally, having a delayed curated discussion is about as exciting as talking to my fish as they swim left around their bowl.
... are you in kindergarden or are you a Nascar fan?