I may have to get an attorney. Plans are to talk with builder and see what we can do. My preference is not do the the legal route.
He created a 15 foot hill that could cause a landslide without a retaining wall. That permanently damages the value of your property. You have no choice but to get an attorney involved.
I read through this thread -- albeit not carefully.
If I understand the facts correctly, you've posted a sign that the neighboring property owner doesn't like (a sign which says "Female Review" -- or, given how you described the sign, "Female Revue" would seem more likely -- and has nothing else on it) because you believe it may impair the neighbor's ability to sell the neighboring lot. You are doing this in order to extort the neighbor into installing a fence behind your property. As far I can tell, the neighbor has no legal obligation to install the fence.
This has nothing to do with libel (or any other form of defamation). It doesn't seem to me that you have any obligation to take down the sign. However, if, in fact, your sign impairs the neighbor's ability to sell the property, you could be liable for interference with prospective economic advantage. I also mentioned extortion. I haven't looked up the law, but that's also a possibility.
If in fact the builder remove the lateral support of OP's property, then they( OP) would be in a good position to have that lateral support replaced by at least a retaining wall and perhaps a fence.
The common law is well established.
https://scholar.google.com/scholar_c...en&as_sdt=4,21It is an established principle of law that every owner of land has the right to lateral support from the adjoining soil, and if a landowner removes the soil from his own land so near the land of his neighbor that his neighbor's soil will crumble away under its own weight, he is liable for damages so occasioned. The right of support to land from the adjoining soil is a right of property, and not an easement, and if that support is withdrawn and injury ensues, he can maintain an action for damages without proving negligence or want of skill on the part of the adjoining owner.
The sign, for all you who do not get the point, is to bring attention to the fact that there is a 15 foot drop-off behind the sign. The sigh itself and what it says has no bearing on the situation.
You can talk about someone making an ultimatum or you can speak of the law. OP is looking for what works for them. The builder cannot remove the lateral support of OP's land. That is the law. Just because he/she doesn't understand that doesn't make it any less according to the law.
The sign and what it says doesn't matter one iota.
However, if you had answered the question clearly the first time that it was asked of you, you would not have been asked multiple times. I also bet that the sign said "female revue" rather than "female review".