Thanks, and yes, partly. Without being asked, it limited each browser to one vote per idea, and it enforced that in the database rather than just in the page: one vote per voter ID per idea, with the count raised by a trigger so nobody can post a made-up total. The weak point was the voter ID itself, a random code the browser makes up. In a private window on the published page, the same idea took a second vote straight away. So it stopped accidental double clicks, but not anyone who wanted to stuff the count. It was upfront about that in its own summary, which I appreciated. Your point about the quiet failures is the one I'd add to the article if I rewrote it. The Lovable build had no notifications at all, so a pile of spam would sit there until you happened to look. Email that silently stops arriving is worse, because you think you'd hear about it.
