Ivan Seeking said:
Then obviously there are a lot of people who don't know what they're talking about.
We've had this discussion before, but I'd just like to point out the other two (well, 1.5) sides of that: there are some (how many would be an enlightening stat) flying saucer proponents who use the term UFO to mean (or at least imply) flying saucers. Some may be careless, some may be ignorant, and some certainly are dishonest. For a 'nobeliever', a judgement has to be made which they are dealing with.
And let's not forget: using the term "correctly" or not, the reason the discussion exists at all is because people are at least hoping that when the FO gets Id'd, it is positively shown to be a flying saucer. As I've pointed out before, if people were hoping to find new atmospheric phenomena (for example), they'd just call themselves meteorologists.
In any case, if you really want to be strict about the definition, you should probably consider the history and entemology. The term was coined during Project Blue Book as a replacement for 'flying saucers' (regardless of who actually coined it, it was coined for Project Blue Book, which had the specific purpose of evaluating their threat to national security). It is a better word, to be sure, but the implication that the term is referring to possible/suspected alien spacecraft dates to its origin and because of that, even those who seem like "respectable" ufologists often use the terms interchangeably.
http://www.ufoevidence.org/documents/doc365.htm
Interchangeable usage of the term:
By any name, however, flying saucers and UFOs...
Characterization of the purpose of ufology via the questions it is to answer:
The phenomenon can and should be approched dispassionately and scientifically from a variety of angles, perceptual, psychological and sociological, to name but a few. If objects from another planet are indeed visiting ours, what form of propulsion system and other technologies are employed? What kinds of biological lifeforms might be onboard? What God or gods will they worship? And how will UFO occupants - now or in the future, immediate or remote - perceive humans: as mental, emotional and spiritual equals or as vastly subpar inferiors?
It is fitting though - an ambiguous term for an ambiguous pursuit.
The guy who wrote the article also understands me pretty well:
...a phenomenon that most skeptics routinely dismiss as non-existent by definition...
Well - by definition or by statistics. Assuming the stats weren't falsified for the purpose of a coverup, Project Blue Book judged 94% to be identifiable as non-flying saucers (I'm not sure about the level of certainty required for such a judgement) and judged 0% to be alien spacecraft . So since there were roughly 12,600 reports, a starting assumption that a new report is probably explainable has a 94% probability of being right (caveat: on this site, such reports are typically pre-filtered) and "not identifiable as a flying saucer" assumption has a 99.992% probability of being right. And that's the reason why such starting assumtions are reasonable - just as reasonable as a starting assumption that a new gravity experiment will produce results that conform to GR.