EA is selling this message as a security feature: DO NOT BELIEVE IT, IT IS A LIE.
The real truth behind this is NOT security because you can still access personal data on the account and other games.
The real truth is that they don´t want you sharing the game, but people with new builds or reviewers CANNOT use BFV correctly because every 5 hardware changes they get locked out of that game for 24 hours.
My personal case is:
I am tweaking my RAM because the ONLY game my RAM is NOT stable in is Battlefield V, it can pass aida64 prime95 memtest and play all other games except this one.
To try to make my RAM stable I am changing my RAM speed 2933 - 3200 -3400 -3466 - 3600 and the latencies CL12-16 and subtimings but every 5 changes I get locked out every 24 hours.
I have contacted them to DISABLE this and they say it is already automated and they WILL NOT do anything about it.
The community is STRONG, if you are affected please report it below and ask to disable this feature that has been torturing people since 2015.