What made you think to add these?
Keep in mind that some areas are hit with lightning and keeping in mind that a "hand of God" strike is not stopped by such, can you share why these are needed?
About laptops. In the USA almost all laptops come with 100 to 240 VAC 50/60 Hz power adapters. So with nearly double the voltage capability can you tell why folk worry about this? And if said power lines did soar that often wouldn't your light bulbs blow out first?