[sneak]

Revoking an IP or AS allocation doesn’t actually immediately stop anyone from using it in practice, though, until their peers stop treating them as valid (which is not instantaneous upon RiR fiat).

The networking community would not walk away from abuse in a literal instant, though. It would take days at a minimum, while censorship would occur instantly. It may be a single use weapon but it is still a weapon.

I am not sure that BGP is broken enough to warrant the signing of allocations (or, more specifically, to fail-closed on unsigned/expired allocations).