Just a few comments on the points here.
First of all, it depends on the guy's tone whether or not I'd think he was an idiot for asking "So, do you like it". I've had conversations with people while waiting in line, and they tell me all about it, and how they've been on it x-amount of times already that day, and x-amount of times their whole life. Then, jokingly, I'll say, "So you like it, huh?" It's just meant to be comical, mind you. Of course, if he honestly didn't know if you liked it or not, well, that's another matter.
And as for people asking "Have you ridden that" while you're wearing a Millennium Force shirt, two things I wonder about that.
One, what would you think if somebody just plain walked up to you and said, "How was it"? Also, it's just a good, friendly way to start up conversation.
Second, the day Phantom's Revenge was announced at Kennywood, some people received hats with the new logo. They're wearing a hat for a particular ride, and they never rode it...
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How dare you vanquish the Steel Phantom without his consent? Fear the Phantom's Revenge.