Some instances choose to “defederate” other instances, which means that users from one won’t be able to see or intract with content from the other. This is primarily meant to combat instances that create spam or host illegal content, but many instances use it for political purposes.
It’s interesting that they don’t extend the logic to, say, Nazis. I am Personally consistent on this: both Muslims and Nazis should have the right to exist, but not to force their views on others.
Trust me, nobody being interested in you romantically/sexually is not as great as it sounds.