I agree that it happens, more than likely depending upon the Parish Priest. Anyone can walk into Mass  anywhere they are not known and go to Communion. Ultimately it is up to the person. 
There will be those who will construe this practice if it becomes commonplace as 'Catholic divorce'. One might ask that if the divorced and remarried are permitted to receive the Sacraments (Penance and Holy Communion) through the application of the internal forum, why via the internal forum can they not have further Church weddings?
I Interpret St John Paul's teaching on ecumenism as being in hermeneutic continuity with the teachings of his predecessors because he cannot reverse it. What I object to is any 'ecumenical' activity which leads to indifferentism, the Assisi gatherings for example.
As I said, I can only guess what your interpretation of AL is. I will stick with FC until the Pope says otherwise.
Btw, that comment was the same 'uncivil' one I posted earlier, I just copied and reposted it.