One of the random thoughts that popped into my mind during a smoke break - aka. it survived five minutes in my mind - was: What would it do if there were a bunch of relayers deploayed all over the place that just listen on N relays and broadcast each note they see to N-$current relays?
Aside from a a crapton of traffic of connecting to some100 relays and constantly broadcasting events, I wonder if this would even "do" anything. o.o