How about: Lower the power used for signalling, make more sensitive receivers and improve the error checking and correcting.
Lowering power might help a bit in the near field, but HF radio signals can propagate worldwide, even at low power levels. A BPL system here in the states could be clobbering radio communications on the other side of the world.
More sensitive receivers would only exacerbate the flipside of the interference issue--interference TO the BPL system by radio transmitters! In some tests, a simple CB or ham radio set near the powerlines was enough to totally disrupt the BPL connection. Improved error correction might reduce this, at the expense of connection speed, and increased radiated interference from the system (more hash as CRC packets bounce back and forth).
And yes, I am a ham radio operator. But it isn't just hams who are up in arms about this. FEMA, police/fire/ambulance, and aircraft comms groups have all filed comments against BPL with the FCC.
As far as "anger" over the issue, it is more frustration with what I (and many others) see as the FCC abdicating it's mission to maintain a usable spectrum for ALL users, in favor of giveaways to corporate interests. Comissioner Powell would much rather score points by promoting mega media mergers and raging against Janet Jackson's boobs than consider technical issues that might impact some corporation's IPO.
[This message has been edited by NJwirenut (edited 03-07-2004).]