Identified errors:
This is not correct for Romania: officially it’s Surname + Given-name, live in Hungary.
Not true for Greece, it’s just First-name + Surname. It just happens that some Surnames are derived from the father’s name (think “Anderson”).
This is kinda weird… Yeah, they can get big. Most usual is to have 4 names (2 first names + mother + father)
Anyway, it’s kinda weird because I wouldn’t give anyone more than first and last name… And that’s what most people do, (unless we’re in the rare situation where two people share the same first + last name). Why was your friend making you write his full name?
It was mostly to accentuate the stupidity of the whole situation, rather than directly being a bastard :)