Ddavid1999
David, you are stuck in 1999-around when the Boro Park eruv was established.Since then Boro Park has expanded, and frum people reside beyond the original eruv lines.They are carrying on Shabbos using a rumored back -up eruv,and are bringing in extra food for kiddish and shalish seudos to Shuls that are in the original Boro Park eruv.Should this be a problem? I called the Boro Park Eruv Society and asked them if there is a back-up eruv they told me that they would rather not give me an answer..