shmooze1 –
“The original subject is not if one may use the Boro Park erev or not.The problem is that for many years ,there are no signs telling people where the boundaries of the eruv are.There are people who carry food into shuls outside of the eruv .One can not rely on the back-up eruv,because it’s just a buba meisa and it does not exist!.Most Rabonim believe that if one does not hold from the eruv, that person should not eat any of the food that is carried in on Shabbos. I would venture to say that NO ONE should eat of the food that is brought into the shuls from outside of the eruv on Shabbos.”