After issuing multiple breach notices, ICANN has finally terminated the registrar accreditation of TrustName, which promotes itself as a bulletproof domain registrar (source)
There isn't really a "bulletproof" domain registrar. Each registrar has operating contracts with ICANN and different registries, and those contracts can be terminated if the terms are violated.
That's what happens when a registrar repeatedly ignores abuse reports.
Source: r/DomainZone · by /u/DigiNoon