If someone is obvious apostate or is currently DF'd, are they actually counted as a partaker??
Not back when I was an elder - 30 years ago. Unbaptised persons, or strangers we did not know, were not counted as partakers either. We would not have counted a DFd person who had never been a partaker before.
We never had a DF'd "legitimate" annointed partaker, but I think they might have been counted if they were previously thought to be annointed. There was, back in the day, this curious notion that if a true annointed became disfellowshipped, they were not replaced by a "new partaker" until they died, because of the possibility that they might repent. When they died, if still DFd, they would be replaced by a "new" annointed. This was used to explain away the occasional young annointed that popped up and was eventually accepted as legitimate - usually in Bethel.
Nowadays, with apparantly a new opening for just about anybody to partake, this DF annointed idea may have gone away.
I have to agree that it is completely pointless for an ex-JW to even go to this, let alone partake of the emblems.