As IT at large we still haven't "solved" the question: what about all these profiles of people who have since died.
Say what you want about LinkedIn, at least they addressed this[1].
I am sure there are plenty of systems out there that will simply garbage-collect accounts that haven't logged in > n days. Or that don't provide any option whatsoever for direct relatives (and others) to deal with the situation and account.
1: https://www.linkedin.com/help/linkedin/answer/a1380121?lang=en