Why should you avoid attaching an antenna to a utility pole?

Utility poles carry high-voltage power lines that pose a lethal shock hazard. If you attempt to attach an antenna to one, any slip, fall, or structural failure could easily cause the antenna or feed line to contact the electrical wires, resulting in electrocution. Furthermore, utility poles belong to the power or telephone company, and it is illegal and dangerous to climb them or attach unapproved equipment. The distractors involving induced voltages or 60 Hz radiations increasing SWR distract from the immediate, life-threatening physical danger of high-voltage contact.