Could this be done using Twitter? Each reporter/citizen who has an update on a news item would post a tweet with the info, and create a link back to the origina

Could this be done using Twitter? Each reporter/citizen who has an update on a news item would post a tweet with the info, and create a link back to the original news item(s) or the one(s) that needed updating. Hashtags would be used to categorize the news item. You get an annotated DAG. User can then filter based on the reporter they want to follow on that news item, the hashtag that is interesting to them, or on the timeline of the news item they're following.