rebyid, the problem with your solution is that in Flatbush where you have to use a sign as opposed to saying “Good Shabbos” those people don’t carry so you’ll be ostracized for carrying in Flatbush anyway. In Boro Park at least, many people do hold of the eruv. I grew up in BP and did say Good Shabbos and still got married. BTW, there are more people like me in Brooklyn than you think.
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