Is it legal for me to use a vpn for netflix us?
Highly illegal.
OK why?
It's not illegal, it just violates their guidelines. If it should come out, they can block your account or your access! 😉
Could one expect legal consequences?
VPN itself is legal in Germany, but using it on Netflix is illegal. All in all, a thick gray area.
If this is noticed by Netflix, your Netflix access will not be blocked, only your VPN access. See image:
https://www.privacytutor.de/wp-content/uploads/2020/03/netflix-fehlercode-neu.webp
Usually not. As I said, it's not illegal, just a rule violation.
The picture is from a website, not mine.
Do not be misled. Not everyone knows the difference between acting illegally and violating the terms of use.
Lion1012 has already given a detailed and correct answer.