Step in mud, you get mud on your shoes

In the Catechism of the Catholic Church, section 2272 reads:

Formal cooperation in an abortion constitutes a grave offense. The Church attaches the canonical penalty of excommunication to this crime against human life. "A person who procures a completed abortion incurs excommunication latae sententiae," "by the very commission of the offense," and subject to the conditions provided by Canon Law. The Church does not thereby intend to restrict the scope of mercy. Rather, she makes clear the gravity of the crime committed, the irreparable harm done to the innocent who is put to death, as well as to the parents and the whole of society.

I’m not a canon lawyer, but I read this to mean that due to the seriousness of the offense, a number of people involved with an abortion face automatic excommunication (subject, of course to mitigating circumstances, such as knowledge of the seriousness of the offense and it’s canonical consequences, as outlined in canon law).

The woman who obtained the abortion.

The doctor who performed it

Any nurse or other medical personnel who assisted with the abortion.

Any person who knowingly drove the woman to the office to obtain the abortion.

Any person who knowingly provided money for the abortion

Any person who promotes the abortion services at the clinic/office.

All automatically excommunicated. The church doesn't have to do a thing. The excommunicated do it themsleves by their actions.

Beyond what this section says, I also suspect that any person who actively promotes abortion – activists and politicians – may also be subject to the same penalty.

I think that anyone who works for Planned Parenthood is also automatically excommunicated.

Basically, if you deliberately step in mud, you are going to get mud on your shoes – and it’s no use trying to put the blame on anyone else.