Farcaster Devs

Is there a way for a client to tag a cast with a flag that prevents other clients from indexing the cast?

Eg. say I'm building Hypercast, and I only want Hypercast to show certain casts. Right now, if a user makes a cast, and it gets sent to hubs, all clients will show this cast by default. Is there an alternative?

Yes, a client could potentially tag a cast with a privacy flag to prevent other clients from indexing it. This would allow for more control over which casts are displayed to users