Ask HN: Could you copyright the data of an IP packet?

In the 'Winning at Candy Crush' thread, I suggested modification of network proxies to give a group of users unlimited lives (thread here: https://news.ycombinator.com/item?id=6739711).

As a response, bmohlenhoff suggested it could be a copyright violation. While I disagree in that specific case, it made me wonder: Could an entity copyright the data field of an IP packet in an effort to thwart in-flight modifications?

I can't think of a reason I like the legal ramifications of such a thing. I'm just curious if it's possible (from a legal sense).