I'm gonna ignore the arguing in this thread and focus on the main question, which imo the answer is to just ignore it. If the guy wants to waste his time downvoting you then let him waste his time. Those points are meaningless and have no effect on anything. So the worst you can do is waste your own time on him. Just block them and their accounts and go on with your life.
I'm begging for someone to take a look at the CSRF error that is still plaguing the site. Sometimes I can't upvote posts/comments withing 60 seconds of loading a page. I have to hit refresh every single time I want to vote on something or I'm taken to the error page.
I believe not all of lemmy servers are federated with Kbin. For example, on my Kbin I never see lemmy.world because they have been defederated. Same for beehaw.
But on slrpnk I see everything, it makes me a little glad to be able to have that separation. .
As I understand it, federation is not necessarily reciprocal. If your Kbin server federates with another server, you will see their content, but if they don’t also federate with your server, they won’t see yours.
For the record, I’m on a Lemmy server and I can see content from Kbin.social just fine.
If you want some more CSS modifications to try out, there's a magazine for them btw. Though it also includes userstyles, there's some full custom themes for magazine CSS there too.
If you have enabled option "Show top bar" then "Magazines" will not be displayed at the top of the page between "People" and "Collections" and you will have to click "All magazines" at the end of top bar to go to the magazine search.
It looks like that poster may be a bot or troll. They just joined and somehow have made their own magazine and then crossposted from that mag, TO that mag, several times...
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This magazine is from a federated server and may be incomplete. Browse more on the original instance.