I can't find the piece of legislation (before OPSI puts stuff up) but IIRC it's obscene calls that are illegal, not prank calls.
As most of fonejacker's calls are pranks but not obscene, it's a different kettle of fish. Obscenity is a bizzare concept though.
Spanner case : could be interesting, like your thinking but I don't think it's relevant. And if another Spanner came up tomorrow quite possibly human rights laws would be used (right to a private life etc.).
Disclaimer : I am not a lawyer, this is not legal advice yada yada yada.
As most of fonejacker's calls are pranks but not obscene, it's a different kettle of fish. Obscenity is a bizzare concept though.
Spanner case : could be interesting, like your thinking but I don't think it's relevant. And if another Spanner came up tomorrow quite possibly human rights laws would be used (right to a private life etc.).
Disclaimer : I am not a lawyer, this is not legal advice yada yada yada.