I am sure it is necassary in some areas of the country. One thing I noticed though is that the mosquitos here in Georgia really only come out at dusk and feed crazily during that time, while during the night there are a few strays that feed here and there.
Usually at dusk I have a good fire going or am still hiking. How many of you find that you use bug nets all the time?? I also know that some people have something in there blood that is like a T-Bone steak to mosquitos. If my family goes outside, then my mother will be the only one to get ravaged by mosquitos and they will just leave us alone, she is the mosquito magnet. Luckily I am not one of those people.