B) Glyphosate resistance doesn't affect a plant's resistance to non-glyphosate based herbicides. If the neighbor isn't using a glyphosate herbicide, he shouldn't care if a weed has glyphosate resistance. If he is using a glyphosate herbicide, he doesn't have much of a complaint against his neighbor.
A great many landowners are not.
B) Glyphosate resistance doesn't affect a plant's resistance to non-glyphosate based herbicides.
All of which are more toxic and usually more expensive.
If the neighbor isn't using a glyphosate herbicide, he shouldn't care if a weed has glyphosate resistance.
"Shouldn't" according to whom? What do you know of what I do? I am absolutely dependent upon glyphosate.
I have a neighbor who has a 50 acre vineyard. He lets every single weed blow seed a lot of which ends up on my extremely steep (much of it nearly vertical) and erosive native plant reserve. I have 317 plant species, of which 97 are weeds. My goal is to develop the means to separate the two. My property may be the cleanest piece of land on the entire Central Coast of California. If those weeds became glyphosate resistant, I'd be hosed.
I employ probably 20 different control processes, many of which are cutting edge technology, probably a third of which rely upon glyphosate. Because I have such steep land, there are several riparian corridors hereon. We have restrictions on what I can use there. Glyphosate is an absolutely indispensible tool in such places. Rendering the weeds glyphosate resistant would be a disaster for me. Giving Monsanto a pass for causing that loss isn't just.
If he is using a glyphosate herbicide, he doesn't have much of a complaint against his neighbor.
I do habitat restoration research and development. I operate in the wild. If I had to go hire a PCA and subject myself to inspections by idiot bureaucrats for what I do to do this kind of work, they'd refuse. It's too dangerous. We are too remote. The timing is too critical and you don't know what you are talking about.