Do you think aliens in ufos have visited Earth? (And all things UFO)

The phenomena of UFO's has been observed since the 1940's. In every sighting, they move lightning fast, outclass every flying vehicle in every period of time they've been observed in on earth. If even one of these entities were hostile, they would easily be able to hit whatever they wanted with zero consequences. You could never catch them, they could outrun anything you shot at them in seconds.

So I'm never too worried when I hear about them. If these visitors haven't blown us up by now, they probably aren't hostile to begin with. They would have done it already, so there must be some sort of other motivation at play. Still creepy that stuff like this apparently exists and is out there but I'll panic once some craft that turns on a dime at 20+ thousand miles per hour actually vaporizes some city with their high-powered weapons. Till then, they're just trolling.