This is a special post for quick takes by TsviBT. Only they can create top-level comments. Comments here also appear on the Quick Takes page and All Posts page.
X is considered normal / fine / normative / good / legal / acceptable, or just unremarkable / not worthy of consideration --> X is so incredibly taboo that in fact people want to do it, and could do it, but don't do it--whether because they choose not to, or because they don't even consider it as a possibility because they don't think of it or hear of it or their thoughts are strongly steered away from it, or because they are punished or inhibited when they do, or because they can't find collaborators.
One example is that X was "abuse people without political power" and those people got political power, and now it's not worth it to express your desire and get in conflict. (That is, you would be punished not only for hurting them, but also for expressing the desire.)