I am deeply grieved, brethren for (Valens) and his wife; to whom may the Lord grant true repentance! And be ye then moderate in regard to this matter, and "do not count such as enemies" but call them back as suffering and straying members, that ye may save your whole body. For by so acting, ye shall edify yourselves.
-From the Epistle of Saint Polycarp to the Phillipians

Shunning, as done in some communities goes against this directive from Polycarp. "Do not count such as enemies," in quotes by Polycarp, shows that this was taught even prior to this early time. We are to swallow our own pride and use these difficult situations as an offering to God for our own humility and others' conversion.