I'm playing. My sons are playing. I don't understand all the talk about tresspassing and not watching where one is going. The landmarks are clearly defined for pokestops. And one doesn't readily chase down a pokemon. It shows up on the screen and you press on it.

Where I live has numerous historical landmarks. It's great to see people out and about at parks. My oldest showed me a screenshot of a historical city where he was yesterday for camp. The community is lined with stops. And it's a good place for a family day, anyways.

A pokestop is google earth placement of landmarks. And you spin the disc. Collect supplies. Need supplies to catch pokemon.