Alessandro,
> Here in Italy, for reasons beyond my understanding, you are bound to get
> a residential connection unless you have a VAT number. I really cannot
> understand the rationale for that, and it looks to me as a gratuitous
> limitation of individual freedom.
Have you asked your provider(s) for a rationale or justification?
> Is it that way all over Europe, or is it just Italy?
Even the meanings of "residential" and "business" connections
vary from provider to provider. You can definitely get unfiltered
(and IPv6) "residential" connections here in The Netherlands.
Julf