[Anticommie]

Most campgrounds don't usually have wires like that nearby so it wouldn't have been on their minds.

You don't have to have power lines in your mind, but I don't believe neither of the four people raising the pole did not see the power lines when raising the pole.
When you are raising a pole, your head goes up and your eyes follow the end of the pole, power line is not a needle on the sky background, you have to be blind or under some kind of influence not to see it.
This is one of those tragedies which should never happen. The victims paid the ultimate price for their recklessness.

[TXnMA]

You obviously have never erected a large tent. They were raising the pole from inside the tent, and could not see the power lines overhead.

Your callous and ignorant comments are totally uncalled for in this instance.