Well, we both said IF. lol
So as the property owner you have a couple choices as I see it.
1. Go ask him IF he knows If he is on private property or not.
2. Go check the records and see If he is on a RoW or on your property.
3. If you know he is indeed on your property ask him to leave or give permission to stay.
In most cases there is some type of RoW so I'd get my info together and take it from there.
But personally I'd have no issue with it as it can do more good than harm.
So as the property owner you have a couple choices as I see it.
1. Go ask him IF he knows If he is on private property or not.
2. Go check the records and see If he is on a RoW or on your property.
3. If you know he is indeed on your property ask him to leave or give permission to stay.
In most cases there is some type of RoW so I'd get my info together and take it from there.
But personally I'd have no issue with it as it can do more good than harm.