R' Chaim Brisker and all his better-known descendents do not use community eruvin. But, RYBS told a story about his childhood back in Chaslovitch. R' Moshe -- in his role as a Litvisher shtut-rav in a primarily Chabad town -- would pay him 2 kopeks to check the eruv each Friday. Tir'u baTov! -Micha