We've used parkhoppers that had our names printed on them but no one ever asked us for any sort of ID. It's a good thing too, 'cause we bought one for my mother-in-law, and her last name is different from ours.
I suppose they could ask for IDs, but unless there's some sort of problem with the tickets, I doubt it they would.
As KCritter stated, unless there is a problem with the ticket they will usually not ask for ID. They have the right to ask for ID (obviously) but as long as the turnstile reads the ticket the CM's don't even look at it. Also keep in mind that if you arrive with a ticket and they ask for ID and you don't provided it they have the right to deny access to the park.
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