> Because it's a common phrase?

I know it's a common phrase (albeit sa uniquely american one? Never heard this from e.g. Brits). I'm asking how it came to be that way when it seemingly makes no sense.

> Same as "get carded"?

No, because "being carded" (if I understand correctly) is something that does in fact happen to you. In trespassing, you are the one doing the trespassing (to something/someone else). That's why I find it so weird that Americans turn the subject into object in the sentence.

> English is flexible; almost any combination of words can start to have meaning

Sure. But taking a perfectly fine sentence and turning the subject into an object (when the physical reality is unchanged) seems strange, and warrants curiosity.