My New Balance trail runners have the longest laces as well. It is a real pain because the catch on stuff and then pull out of the knot. The shoes are pretty much done hiking and are worn out, but if my next pair have long laces, I am cutting them right away and using shrink wrap on the edges. Either that or I am switching out the laces with bungee laces.

I think the reason is because most people don't know how to tie their shoes properly and therefore always tie a double knot to keep the knot tied.