I guess the short way to put it is "sometimes it's best to remain silent, even if you are correct". I think that emily's point is that you may have a person come along who sees "I knew it was fake all along" without knowing the details of this particular accusation.

Perhaps if they know the details as well as you do, they would understand what you mean and there wouldn't be an issue, but if they browse the site casually (or maybe heard about the hubub and wanted to check in) they would see a handful of comments like that with a few handfuls of upvotes and assume that this is the default attitude of this site toward SA accusations. This could be incredibly isolating toward someone who may be a victim of harassment or assault, when most of us intend to be inclusive of people who have those sorts of experiences.

My suggestion to anyone reading would be to re-iterate emily's original point, and try not to be overly snarky or memey about the situation. Any commentary should proabably be fairly verbose and lay out the context, instead of assuming that everyone already knows what you're talking about. If someone still wants to snark it up, it's probably best to take it to a group DM or something where your audience is a bit more limited and assumptions are safer. If someone is going to have the attitude of "it's the internet, if they don't have context it's not my problem, I don't really care" some self-criticism is probably in order.