[TeMPOraL]

What do you mean by "-1"?

RE signaling issue - those people who are opposed to CoC are reacting because the CoC trend did not appeared from nowhere - it's the result of the SJW narrative that's been spreading around the Internet. So by accepting the CoC they feel they're legitimizing (what they perceive as) the culture of outrage and censorship that hides beneath the talk of preventing abuse.

[rdtsc]

See the original proposal in the mailing list. The maintainer drafted the CoC contents. Shared the link. Asked people what they thought. A lot of them simply replied back with -1. Some explained their choice, but a lot didn't.

[protomyth]

I would guess because it can become dangerous to one's career to explain in these circumstances but they believe it to be a bad thing. -1 is a vote. The more words you put down the easier it is the interpret what you say in the worst possible way.

Heck, following the wrong person on Twitter gets you on a ban list, so expressing opposition at all should be taken seriously.