Sure it does. Entering someone's land when they've told you to stay out is known as "trespassing".
> If it were otherwise, then what's to keep from having a company city, or company state?
Assuming the land is legitimately homesteaded and purchased? Nothing. And there's nothing wrong with that.
https://en.wikipedia.org/wiki/Freedom_to_roam
That points out that "Ancient traces provide evidence of the freedom to roam in many European countries, suggesting such a freedom was once a common norm."
It's also been noted that the freedom to roam is strongest in those areas which didn't have feudalism and serfdom.
Just like feudalism and serfdom, company towns have a history of being controlling and exploitative .. and un-democratic. That's what's wrong with them.
If it were otherwise, then what's to keep from having a company city, or company state? Sell off Seattle to Bill Gates, and make it his fiefdom.