Attack of the Dandelions

This is my first spring in the East - when spring finally hit last week, my yard filled with Dandelions. Not a few - BUT THE WHOLE YARD. They are in big sections with perfect lines, you can tell the builder brought in some dirt FULL of seeds.

Why do we hate Dandelions so? They are hearty, perennial, give us not one but TWO flowers.

I have more Dandelions than grass. Here is a question for the environmental conscious but Dandelions haters? If you had this many Dandelions over 4 acres - would you spend 5 years diligently trying to rid them - or would you pour poison over them to kill them now?

I'm choosing the 5 year plan. I bought a harrow, and spent twice as long mowing/thatching my lawn (10 hours) - and applied an all natural fertalizer (lovely smelling).