> Don't you think that it would be better if certificate authorities were limited to certain TLDs? For example, a company from country A limited to A's national TLD? This way even if they are ordered to produce a fake certificate, they can only decrypt traffic for country A's sites.

I think it would harm users relying on certain sites. This already happened with CNNIC and .cn, so I don't think that mandatory restrictions would make it better (and besides, the only CAs which voluntarily ask to restrict issuance to certain TLDs are government CAs).