I'm not sure this will go very far as a feature request, for the following reasons.
What's a 'legitimate star'?
Each person is given their own portion of stars, and they use them to star what they deem interesting, not the rest of the room. Giving that, I don't think there can be a such thing as a 'legitimate star'.
- As a side note, one person in The Comms room has a 'stalker' who, from time to time, will startstar every message that user posts, until they hit their daily limit, which brings me to point 2:
Push it to the limit
There's a daily limit. If posts are being starred beyond the daily limit for a single user, then you can bet there's more than one person doing the starring, perhaps it's a conspiracy?