Killing a baby maple tree? (Weed size)?

My dumb neighbour has planted a baby maple tree on my lawn because it's right beside his driveway. It looks like a weed right now, but if it gets bigger the location is just horrid and potentially dangerous, but I don't really know him enough to talk to him. Is there a way to kill it naturally? Like pouring vinegar or something on it because I don't want to use chemicals and I'd like to make it look like it was just a natural death. Please no comments telling me I'm a horrible person or etc. because I have just planted 5 trees in my own backyard, and I would just like to subtly stop its growth because if you saw where it was at you'd want it gone too.