Yes! I was just reading a post from the authors of Lemmy on lemmy.ml, and noticed I was not logged in. I assume that because lemmy.ml is another instance, I can't log in with my usual lemmy.world credentials, but since it is federated I should be able to post, correct? However, I am not sure how, and I think a lot of people would just try logging in normally, since it's just Lemmy, right? Lemmy.ml might be safe, but I think it could be possible to confused people into entering their password for fediverse sites on malicious instances, which steal their credentials. It's a little bit confusing to noobs like myself to be honest.

An app that can manage credentials and post properly across compatible instances and show informative messages to notify the user if and why they cannot post would be very useful, managing multiple accounts seamlessly even more useful!