What you say is technically possible, if they are hell bent to ban all your accounts (But then you probably messed with a Linden on a very personal level).
Which in reality doesn't happen, their protocol is just to ban people based on MAC and ID0, occasionally based on IP address but that's as far as it goes.
Also according to a GDPR request I read they do not gather any other login information, it may be possible they secretly do.
But if they do, they will not ban people based on this secret information, because than it would become obvious they are hiding information from EU users, which is legal hot water.
Which in reality doesn't happen, their protocol is just to ban people based on MAC and ID0, occasionally based on IP address but that's as far as it goes.
Also according to a GDPR request I read they do not gather any other login information, it may be possible they secretly do.
But if they do, they will not ban people based on this secret information, because than it would become obvious they are hiding information from EU users, which is legal hot water.