I’ll admit I don’t know how Lemmy works in communicating to each other. However, Internet traffic is labeled in some manner. It has to be to ensure data traverses the web of routers we call the Internet. Lemmy instances have to identify each other to share their information to each other.
Just ban whatever traffic Lemmy instances are looking for.
Not sure how. The Constitution is pretty explicit that States get to determine how they send delegates to the EC.