Perhaps I've misunderstood your posts. If by "collective entity" you mean
simply a composite object, such as a galaxy or a person, I've no objection
to your usage.
I was under the impression that you wished to extend the term to include
such non-objects as "society" and other relational systems which are often
reified as some sort of "entity", giving rise to a certain class of
category error. This is what I've been arguing against. If this is not what
you have in mind, then we're in accord, and I apologize for fostering
confusion.