[imardmd1]

Can I detain you against your will? No. That is an overt act which harms another person. That is not permitted on either private or public property . . ."

I think you need to qualify this statement with a demurrer, something like:

". . . if it is open to the general public."

Even the police are not ordinarily welcome past the threshold of my property unless (a) I invite them, or (b) I am holding an "open house" event. Is this not so?

[WayneS]

I cannot detain you against your will on my property whether it is open to the public or not.