Yes. I think your comment where you explain that you're not trying to punish them but it's better if they learn quickly that they need to DNW gore if they don't want it to be bizarre because most fic, period, isn't as gory or violent as canon, and there's no real reason to assume someone wants that just because they haven't explicitly DNW'd it. If you want to write it, that's certainly your prerogative, but you aren't framing it in terms of what you want to write or your attachment to the canon. You're framing it in terms of teaching someone a lesson. That is bizarre.