If you were out in space looking at the orbit around earth, you'd find out we are the trashy neighbors of the universe. It's Fred Sanford's junkyard out there... we don't see it of course but it's there, and it's as polluted and trashed up as any place ON earth.
I think putting a probe on an asteroid is okay, maybe one we can program to return home so we don't litter any more. Unless that asteroid is going into the sun, in which case, it can incinerate our trash. I love how we see more and more of the universe though. And a Skull asteroid, wow!
I watched a documentary about asteroids, or listened to it, rather. They have little to no gravity, so landing on them is very difficult. I know private companies want to mine asteroids. and we I think already blew a hole in one of them, according to an excited NASA person on the documentary! I hope for now, that it's too difficult for people to get out there and blow up too much stuff or trash it up.
We could clean the earth up better, and maybe one day clean up the mess we've made in space too. I fear if the aliens want to clean earth up, we'd be the stuff they'd remove... we made a mess!