I wasn't really serious, but even so I don't see why end users shouldn't have the ability to write complex muting filters for their own feed. That's not squashing anything. Anybody is free to write empty casts, but I should be free to ignore them (and/or not even see them).
I think you would benefit from a "Prosumer" client rather than a mass consumer client like Warpcast. Check out (in no particular order) @fiids @supercast @us3r @herocast and /opencast