The aim of the billboards I am speaking of is to confuse the semantics between anti-Israel speech and antisemitism, and to normalize ostracization of those who

The aim of the billboards I am speaking of is to confuse the semantics between anti-Israel speech and antisemitism, and to normalize ostracization of those who do either, effectively contributing to the chilling of speech over time by forcing dissenters to be more careful about when and where they denounce they genocide. You are taking for granted how many of these damn billboards have cropped up recently and how prominent they are. Don't you make the connection to McCarthyism? We've seen all of these tactics before, and road signs have long been a prominent medium for controlling public opinion.