The remark was hypothetic and not meant as insult to German speaking people. Its a general remark which also counts for other languages. Its not only related to social maturity, its also related to law (e.g. DMCA.) It is something the founders and those who are legally responsible must keep in mind.

Each solution has their pros and cons. Both a local subforum and an independent forum is also possible, or just letting either one arise based on supply and demand. Ubuntu has native forums under the Ubuntuforums flag, but also independent domains with their own community.