Plenty of "sceptics" around... until they get involved in a real UFO incident. Then, perhaps not surprisingly, their attitude changes in about one nanosecond! I've been fascinated by the subject for nearly 50 years but don't expect to hear any answers (if there are any) in my life time. To add to my curiosity I was very closely involved with two UFO encounters in Africa in the late 60's, both of which were observed by experienced aviation personnel and neither of which could be explained as anything rational. "Scary" is not quite the description I'd use... "bl**dy terrifying" gets closer.
During my time at Heathrow I have also been involved with two encounters - a dark, rocket-shaped object seen flying at speed near LAM and the scary British Midland encounter at OCK. The Midland guys, knowing full well that a UFO Report would simply be binned, filed an Airmiss in the hope that an answer would be forthcoming. Unfortunately I never heard the result of the investigation..