And this is precisely why aliens will never land on Earth. They already know they wouldn't get a warm reception.
Reminds me of the time I was on Manhattan subway and after a bunch of homeless people came through asking for change, a dude came through offering free stuff to the needy, urging anyone in need to come forward to get free food or clothes. And you know what? The people on the subway were even frostier to the charity guy.
Here's what they do. They do kind gestures like this to throw you off and make you think lots of people in the world are nice and generous, then when your guard is down they show their TRUE true colors.