Haha, I thought the same thing DJ. Not my house, I just grabbed a pic of Google to illustrate what I meant. If I lived there, the tree would be gone...probably by me taking it as I backed out the garage.
In regards to the natural rock Duct Tape Man mentioned, it is a good and possibly low cost/free idea depending on your situation. I've never used in this application but used around some flower beds before. Eh, it was okay I guess. It wasn't flat so I spent extra time with the weedwhacker on it.
With the blocks, you can run the lawnmower near the edge and then quickly hit the flat edges with your weed whacker.
Of course, the blocks can get expensive fast.