yes on the boundaries. it varies by town but some of them require you to change the sign each year and keep it up to date with the town. so it's like an annual task for a landowner who typically has a million other tasks to do. here is an entertaining video series related to this: https://www.youtube.com/playlist?list=PLc-AG0_QlqbCo_rhLic0A...
Hmm I was initially on the side of “everyone should have free passage through forest”, but “anyone can shoot your animals unless you re-post hundreds of signs per year” doesn’t seem like the right balance to arrive at either.
Basically, you have two options: A 500 foot "safety zone" around your house, which is easy (though not automatic like Maine), or a full posting of a larger area. Full posting requires:
1. Post every 400 feet.
2. Update the date on the signs every year.
3. Register with the town office for $5.
For people who own a lot of woods (in the hundreds of acres), this is deliberately obnoxious.