I suspect they'd just drop by to laugh and point. When the novelty wears off, they'll scoop up some interesting shells off the beach and hit the hyperdrive for home.

We'd probably try to experiment on them. Some people will do anything for grant funding... :-)

Playboy magazine had an interesting article on this back in the 70s. In fact, it made such an impression that I: 1. Not only read the article, but 2. Recall it to this day. The title of the piece was "Kill Them and Eat Them", to give you an idea of what follows. The gist of the essay was that any civilization visiting Earth from interstellar distances doesn't have much to learn from us. We can't amaze them with iPhones and wireless Internet if they have interstellar transportation knocked. So for what purpose would they be here? Experimentation? Hardly -- would we visit Mars to "experiment" with the primitive life forms we might find there? No, if we visit other planets it's to see, more or less, "what can WE get out of this?" That is, metals, energy ... and food. (Maybe water, too.) So visitors to this planet will not have "technology transfer" or "art" on their minds. Therefore, we'd better not make it easy for them to be here: display to them quickly and without mercy just how barbaric we can be. That is, kill them and eat them every time. Until they mark this place on the charts as "Too Dangerous. Avoid." It's probably not a bad idea. I keep a knife and fork on the back porch with me when I go out at night to look at the stars, and the grill always has a propane bottle ready to go.