It’s not relevant to me as I don’t live in Brooklyn. But on the rare occasion I find myself in Flatbush on Shabbat, I don’t use the eruv since my rebbe, R. Shlomo Drillman z”l was steadfast in his opposition to it. Out of respect for him, I’d refrain from doing what I otherwise might do. But he died before the Boro Prak eruv was built, and I wouldn’t consider myself bound by his views of the Flatbush eruv when in Boro Park. After all I have no idea what he might have said about the Boro Park eruv. In Boro Park I guess I would do what my host does.
