I happen to think The Rentch is right on track. I don't know what is worse... people spouting wrong stats... or people who try to correct those who spout wrong stats by butting in and expressing the correct stats (or at least what they think are the correct stats). I don't know how tall my favorite coaster is... I think it is around 80 feet, but I am not sure. So I suppose I am one of those "annyoing" people who may make a mistake and will have be corrected by those who know everything.
In the grand scheme of things, what does it matter? If you say "The drop on the Steel Phantom is (or now was) 200 feet," does it matter if you are off by 25 feet or so? Not hardly. But there are some who feel compelled to correct this error, to either "enlighten" the person with the truth, or just show off their "superior" (ha!) knowledge.
If any of you are familar with the Titanic (not the movie, but the ship), there are a whole group of arm chair Titanic historians who will argue till they are blue in the face the exact number of dishes on that ship, or the exact number of steel plates in the hull, etc etc etc. They call these people "Rivet Heads" or "Rivet Counters". On that same line, I refer to the coaster "enthusiasts" who feel the need to spout pointless stats and correct those who do not know every pointless stat as "Bold Heads" or "Bolt Counters".
On the same token, as The Rentch also stated, if you say "This coaster once came off the track and 18 people died", yeah, that is something that is dead wrong (pardon the pun), and it can reflect on the reputation of the park or ride, especially in these days of muck-raking "journalists" who will turn a coaster stopping on the lift hill into a "major accident" and senators and congressmen who feel the need to protect us from ourselves by introducing all types of legislation designed to scare the heck out of us.
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"I wasn't always this cynical, but then I started kindergarden..."