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Re:Tourism Is Overwhelming the World's Top Destinations by jerf on Monday August 12, 2019 @10:27AM (#20675695)
Clearly, the Hacker News gestalt is providing us a solution here; set Python on the tourists. "Sir, in order to visit the Eiffel Tower today, I'm going to need you to tell me what this Python code does...."
Re:Tourism Is Overwhelming the World's Top Destinations by gumby on Monday August 12, 2019 @10:40AM (#20675809)
Given some of the code I've had to spelunking this may be an unsolvable problem.

The Eiffel Tower was built as a tourist destination so they'd make the problem easy, but this might be good for Machu Picchu

Actually for the latter it could be a knowledge of the history quiz, or a leave-no-trace quiz...