[quote="dans0622, post:18, topic:284803"]
It is not that the Church "prefers" formal defection. It was a concept added to the Latin Church's law which would enable more people to be in valid marriages. The preference was for valid marriage, not formal defection. In the law of the Eastern Churches, however, there never was such a concept. The Western and Eastern Churches are now in accord on the topic.
As there are no automatic excommunications in the Eastern Churches, the OP would have to submit to a formal trial in order to be excommunicated. Since that would only happen after the commission of some crime--which, in turn, requires evil conduct--I must remain silent. I hope that I would never think to tell someone to commit a crime or carry out some evil action, no matter what his/her motives were or rationale was (cf. Romans 3:8).
This is not accurate. You can defect from any sui juris church, Western or Eastern, by virtue of written request. No trial is held, and no excommunication is proclaimed. Neither defection nor excommunication absolves an individual of their duties under canon law regarding marriage, mass attendance, or anything else, in the Western or Eastern churches.