You can't "lock" something that doesn't exist.

[Kaedan]

Thing is, SE has asked the playerbase to make their voices heard and provide feedback so they can take it into consideration, not to "just wait and see".
I get it, some people are very loud and obnoxious (and that applies to both sides really), but ultimately all people are doing is what SE told them to do. And for what we know, if we don't speak up now, they are never going to add either missing gender option.
So let people speak up, they have a right to do at least that.

That's perfectly fine if people want to post letting Yoshida know they want the other genders.

But the vast majority of posts haven't been just that. They come riddled with thinly-veiled insults and threats. So you can't really expect people to just sit by and let the vitriol spill.