How early is toooo early to mow your lawn?

United States
August 2, 2009 8:40pm CST
I have a neighbor who gets somewhat picky bout his lawn. Right now he's sprinkling his lawn & it's supposed to rain tonight/tomorrow. But he was out mowing the lawn at a lil after 7am! Now 7am is pretty early and to me common courtesy would say to wait til 9am just in case your neighbors are asleep. OR AM I WRONG? But to really shock you I've been up early to find him out at the crack of dawn mowing his lawn.... literally 5am! How early do you think is acceptable to mow your lawn? I think 9am. How about my fellow mylotters?