RIPE NCC need not decide whether a behaviour is legal or not in order to prohibit use of resources that it allocates for such behaviour.
Wearing a T-shirt, shorts and flip flops is perfectly legal and yet you can be refused entry into a fancy restaurant if you wear them.
Nobody gets to sue the restaurant for refusing admission by claiming that tshirts and flip flops are perfectly legal attire, and even nudity is legal in some parts of Europe (German topless and nude beaches say).