Earlier quoted context omitted.
> players have always been able to easily doxx one another, know where other players live, That sounds unlikely.
The actual case is that GTA Online sessions are P2P. As such, when connected to a session, your IP is exposed to the other players. This doesn’t really qualify as a ‘doxx,’ as that in and of itself is not particularly PII. Furthermore, playing without a menu is possible and has been for years. It just helps to boot yourself into a new/empty session every once in a while.
From what I recall, while the sessions are P2P, they've implemented proxies between players to prevent the old problem of IPs being exposed.