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As soon as the Roman Catholic church starts excommunicating pro-abortion “Catholics” like Kennedy, Kerry, and Giuliani, I’ll start listening to Roman Catholic criticism of the Anglicans.
Can. 1398 A person who procures a completed abortion incurs a latae sententiae excommunication.

So unless they are directly involved in the act, it isn't that simple. It gets into a "judgement call."

Can. 1369 A person who in a public show or speech, in published writing, or in other uses of the instruments of social communication utters blasphemy, gravely injures good morals, expresses insults, or excites hatred or contempt against religion or the Church is to be punished with a just penalty.
Can. 1399 In addition to the cases established here or in other laws, the external violation of a divine or canonical law can be punished by a just penalty only when the special gravity of the violation demands punishment and there is an urgent need to prevent or repair scandals.

There are the canons that would need to be applied. Unfortunately, the process to apply those canons would need to be done through litigation, applying a ferendae sententiae punishment, rather than latae sententiae (automatic). And you KNOW that would be ugly.

For me, I would be happy if the individual's bishop would grow a set of cahones large enough to publicly direct the individual in question to not receive communion and to direct his pastors to not distribute communion to the individual in question.

But barring that, I hear your words.