I don't even leave tags in their profiles because it is clear that the moderators will simply destroy their accounts. As an example, this account, even after Nutildah and my tags, again created a post using AI. I made a report; I think the topic will be deleted.
https://bitcointalk.org/index.php?topic=5543671.msg65390458#msg65390458
https://bitcointalk.org/index.php?topic=5543671.msg65390458#msg65390458
Yes, it seems the mods are taking to deleting whole topics if the first post is AI, which is great, IMO. People will think twice before responding to AI-generated idiocy knowing their posts won't be counted.
And you're right about not having to leave tags on every account. Some newb accounts with 10 posts or less will be nuked if all their posts are spammy garbage, rendering the tag unnecessary.