> So I guess I don't share the principle that you seem to have, that if I don't like a conference I should simply shut up and not attend
If you want to complain loudly about the conference as you don't attend, go for it. But once you're pressuring sponsors into pulling out, once you're running a weeks-long harassment campaign against the organizers, and especially once you're pitching a fit about the conference managing to find other funding despite your best efforts, that goes way, way, way beyond mere complaining. You are making an affirmative effort to prevent the conference from happening at all, and at the very least I'd suggest that you own it.
If you want to complain loudly about the conference as you don't attend, go for it. But once you're pressuring sponsors into pulling out, once you're running a weeks-long harassment campaign against the organizers, and especially once you're pitching a fit about the conference managing to find other funding despite your best efforts, that goes way, way, way beyond mere complaining. You are making an affirmative effort to prevent the conference from happening at all, and at the very least I'd suggest that you own it.