Of course not, but according to the article, Hawking was referring to sightings of UFOs, not just little green men.

""We don't appear to have been visited by aliens," Hawking said, adding that he discounts reports of UFOs. "Why would they only appear to cranks and weirdoes?""

Now maybe the article misunderstood what he meant, but as its printed it looks very insulting to anyone who claims to have seen a UFO that they thought might be alien in origin. You're probably right though and I'm probably just reacting because of the way the article printed his statement.