Well, my question is very simple. If I'm friends with Scammer because they are nice to me, I was called a scammer, although I never sold anything in my life. Am I a scammer then?
Nope, but then you're a potential scammer, since you approve of scams if you just let your friends do it.
Let's say you have a friend who is an alcoholic and that you have never drunk alcohol before! Are you also an alcoholic? No! We'll transfer that to a scammer now! Are you also a scammer? No! That's all good!
It depends on where he scams!
If he scams on a server, e.g. Opsucht, Durchrasten, Bausucht, Griefergames etc. And you know that and not report it then could possibly be punishable!
If you are friends with a scammer that does not mean that you are a scammer, but you do not have to worry about punishment because you do nothing!