They are usually broken because Google often pushes shady obfuscated updates. IIRC the OFFICIAL "Personal Blocklist" was broken for a long time due to this. A

They are usually broken because Google often pushes shady obfuscated updates. IIRC the OFFICIAL "Personal Blocklist" was broken for a long time due to this. AFAIK there's still no way to block entire TLDs. So basically Google doesn't give a shit about you!