Oh, Oh, Oh. I just remembered this. It is extremely pertinent.
The wedding at a Kingdom Hall is a meeting open to the public. They don't have to
invite you, the invitation is open to the public.
The reception has nothing to do with the BOE. The Groom or his designates are
responsible for that. It is the responsibility of guests to decide whether to inquire
about non-dubs or ex-dubs or inactive dubs. Now, the Groom and those hosting
the reception may have decided to uninvite someone because of something the
elders said, but it sounds like they are all backing down to the pressure from
elders when they don't have to.
"Putting all those other people in jeopardy" is a smoke screen to let the elders
feel like THEY are in control of who gets to do what.
This doesn't really change anything, UNLESS your daughter wants to get in a
pissing contest with them. If she did want to go to the wedding (but not the
reception which she was uninvited to) then I would say, "Pack up the husband and
the kid and anyone else you want with you, and go to the public meeting that is
a wedding." Don't be argumentative when they get there. Just come in well
behaved and sit down. Let them be the jerks.
After reading your reasonableness, I am sure you don't want this to happen.
I just say this because the elders overstepped their bounds.