This must be the ugliest most short sighted unimaginative laziest designed flag for planet earth ever made... A circle of 7 ring noses... Why 7? 7 continents? Or is it 6 continents? Why is the center hollow? Hollow Earth Theory?
well maybe because they knew what my lucky number is
Looks better than op's. But pluto shouldn't be there.

And a flag that gives information where we are can be a bad idea.
The flag represented what Earth and where it is. So, maybe if aliens are really exist, they will know where the location of Earth is from the flag.
Unless they can scan multiple billions of billions of star systems in full 3D (up, down etc) there will be very little chances they will know were we'll be located exactly just with this flag. Also keeping pluto on the flag as a planet is a good assurance to mess up with their google cosmo-map system, just in case...