Si/notaratface,
I totally see your point, but it isn't plagiarism on Sporcle, but laziness/self-perfection that is the problem. For example, Santa's Reindeer was published by Sporcle back in like 2008, yet every year dozens of people remake it. Half of them make it because they didn't bother to search to see if it was there. The other half make it because they think they are perfect and awesome and any idea they have must be unique, wonderful, never-been-done, and there is no need to search because they are amazing.
I would say at least once a week, someone remakes one of my quizzes, and I'll admit I've accidentally remade someone else's quiz about 10 times in the last 6 years. And that's with searching and checking, but sometimes someone comes up with a creative title that masks your search. We all make honest mistakes and the quizzes go away. I just tested now and searching "Mick" in Sporcle shows your quiz right up near the top of results, and it was really easy to spot among the Mick Jagger and Mick Foley quizzes.
When Sporcle publishes a quiz, they look very hard to make sure that that is the first version of the quiz that was done (because let's face it nearly every good idea has been done multiple times on Sporcle by non-searchers) is the one that gets published. Sporcle does make mistakes and so do Editors and Curators making picks. They probably didn't search to see if yours was first, and yes they should have. Of course, a lot of time a duplicate quiz brings the original one to light. When someone copies someone else's quiz, i ALWAYS make a comment on it showing the link to the original quiz, to make sure people know that, and I often report the quiz too.
So part of what makes Sporcle work is that lots of people make quizzes, but that means everyone has to be vigilant about searching when they make quizzes, vigilant about commenting and reporting quizzes that are duplicates or unauthorized sequels, and people should RATE quizzes and NOMINATE quizzes because the only way editors, curators and Sporcle admins will see quizzes if quizzes get plays and nominations, because Sporcle can search quizzes by nominations, ratings etc. I'll admit, if i find a good quiz, i'll nominate it, give it a good rating, and report all the quizzes that copied it.
Chris/SproutCM
PS For fun, try searching for something like "triple crown" or "mad men characters" and look how many people keep remaking other people's quizzes. Remember it's not plagiarism: that would have meant they took the time to search and find your quiz and copy the data out of it. And we already know they didn't do a search :)