People should concentrate more on feeds directly out of modems. This is most common weak link I see...
I have tried to address the situation.
I have my modem attached to a modded Cisco 2960 switch. Then (Cat5?) ethernet cable running 10m (can't replace this cable unfortunately) to an ethernet outlet.
Have a Lan isolator connected to the outlet to a modded Cisco SG110D switch, then another Lan isolator connected to streamer.
That may address some of the issues.