If the dish is struck by lightning having it properly grounded 17 awg to 10 awg to # 6 bare copper provides a safe path for the strike into the ground and away from your FAMILY. You can replace all the equipment!!!
Doing a good ground for the dish is an excellent idea. That, of course is a safety ground.
Anyone who thinks that a #17 wire or #10 wire to #6 wire to.....what...this post doesn't say? is sadly mistaken. PLEASE NO ONE FOLLOW WHAT IS SUGGESTED IN THIS POST, thinking it provides any safety from a direct hit from lightning. It could be more wrong, but not much. There is NOTHING in this post that would assure safety from a direct hit for either you or your equipment.
Grounding for lightning protection is a VERY, VERY DEMANDING discipline, and the "suggestions" in this post are nowhere near close to meeting that requirement.
Anyone who has interest in increasing the liklyhood of personal survival and equipment survival in the face of a direct hit of home electronics needs to go to polyphaser.com and read their excellent documentation on the issue of ground protection. Pay special attention to the concept described as a "single point ground".
Running a single thin wire from a dish to a single ground rod is NO PROTECTION WHATSOEVER, FOR YOUR FAMILY OR YOUR EQUIPMENT from damage as a result of a direct hit.
Dishes need to be grounded, period. Lightning mitigation is an ENTIRELY DIFFERENT ISSUE. The ground requirement on dishes is a SAFETY GROUND protecting against GROUND FAULT conditions (local shock hazards). This has absolutely nothing to do with lightning protection.
I wouldn't have posted things in caps ...but the advice in this post is so ill-advised and so ill-informed, that it needed to be refuted before some poor soul gets killed trying to follow it....and T-Boomer season is upon us.