This is one of those cases where you can simply do it and stop worrying about
whether the telco/cableco is right or wrong. Buy a couple clamps and some 6 ga
solid and bond them. You can just call it a cheap insurance premium. The
utilities are certainly not going to pay you if your electronics all go up in
smoke during a thunderstorm because of a ground shift between the electrodes.

If you go back through the archives of the various electronics and home groups
you will see lots of arguments about surge protection but one thing that is
consistant between all of them is that you need a good single point grounding
system.