Yes.. the last tournament of hikaru no go manga showed a korean manga character who had a lot of similarities with a real life korean go player, so he filed a case against it. Lol after knowing that i was wondering why it didnt get copywright issues for using hoinbou shusaku(legendary go player) and literally decrediting his go achievements by saying it was Sai who played through him :V
I could say a lot, but then again, humans such as yourselves have different tastes in weird. I'd say so far would be Hetalia, but I've always had an interest in it, knowing what it was about. Although I loved Hetalia so much I made my own, although modified it to suit my own interests, then again, the first novelization of it (despite it's shiteness and some mild 18+ content), it's by far my most popular project and biggest yet. If I've piqued your interest, I'll grab it by the tail and say it has over 250 characters in it.
definitely a good one if looking for a different kind of anime (and better if u can find the uncensored version)