Still a bit worried about hashtags being used for ads

Coca-Cola could have an official profile on mastodon.social and use hashtags there as well. Whether corporations use hashtags or not in their “regular” Mastodon posts has nothing to do with Threads.

Also Mastodon has user-level features to restrict unwanted content to show up in your feed ranging from hiding boosts up to blocking the entire instance:

And since Lemmy cannot interact with Threads content at all, defederating Lemmy instances from Threads makes even less sense. One of the big Lemmy instances blocks Threads but doesn’t block CSAM instances. Insane priorities their admins have.