Yes and they post on GFY all the time.
The technology required to travel the universe is immense, far in advance of anything we have. The cost would be exorbitant. So you have to figure out WHY, WHAT'S IN IT FOR THEM?
They build technology way beyond our comprehension and costs to abduct a potato farmer and his wife to do experiments on them? Use a bit of common sense please. If aliens come here we would be shitting ourselves. They would want something back for their investment. They're not tourists.