If I'm reading this right, some pax were already in WT+, but had some friends come and join them from WT. Is that right ? And the OP was told they couldn't go and sit in WT for some peace and quiet ?
So, self upgrading and causing a disturbance is OK, but self down grading is not ?
Ridiculous.
I'd have made sure I spoke to CSM, and would also be submitting a complaint after the journey.