rtl-sdr over multicast & multiple decoders

[James Sharp]

I've been playing around with rtl-sdr as a way to stream trunking radio 
and air band traffic.  I've done a bit of research and found people who 
are using multiple dongles, one to digest the control channel and one or 
more to tune and receive the voice channels as the talk groups come and 
go.  They're also using multiple dongles and/or squelch scanning to 
stream airband signals

Around here, all of the channels of the trunking system as well as all 
of the "interesting" fit inside the bandwidth of a dongle running at 
3.6Msps.  So, my question is this:

Would it not be more efficient to have a single tuner dongle outputting 
all of its samples over multicast (or into a shared memory segment for 
that matter, if you want to stay on the same host) and then having a 
bunch of decoder processes listening to the samples and decoding what 
they need out of them?