Around here I have seen Dish installers that connect to any Metal pipe available, Including Gas Pipe.
And the gas lines are plastic feeding the houses. There should be a warning on the gas meters but there is not.
Why would a warning on the gas meter be required?
The grounding electrode conductor must terminate in accordance with (1), (2), or (3).
(1) Buildings or Structures With an Intersystem Bonding Termination. The grounding conductor for the antenna mast and antenna discharge unit must terminate to the intersystem bonding terminal [Art. 100 and 250.94], as shown in Fig. 1. Bonding all systems to the intersystem bonding termination helps reduce induced potential (voltage) differences between the power and the radio and television systems during lightning events.
(2) In Buildings or Structures Without Intersystem Bonding Termination. The grounding conductor for the antenna mast and antenna discharge unit must terminate to the nearest accessible location on the following:
• Building or structure grounding electrode system [250.50].
• Interior metal water piping system, within 5 ft from its point of entrance [250.52(A)(1)].
• Accessible means external to the building, as covered in 250.94.
• Metallic service raceway.
• Service equipment enclosure.
• Grounding electrode conductor or the grounding electrode conductor metal enclosure.
(3) In Buildings or Structures Without a Grounding Means. The grounding conductor for the antenna mast and antenna discharge unit must terminate to the nearest accessible location on the following:
• Any individual electrodes described in 250.52
• Structural steel grounded in accordance with 250.52(A)(2)