Google obeys robots.txt file. Padmapper does not. That's a critical difference.
The point is Google respects publishers' desire not to be indexed. Padmapper does not. Robots.txt is simply a common method for conveying that message. It's not like Padmapper could argue they didn't know CL was unhappy; they got a certified letter!
This is just semantics. Google respects publishers who do not want their sites listed.