> Did you have a nasty break-up? Fire someone? Do you have a business rival who would like to see your reputation ruined?
If you were dating someone, worked at the same company, or even in the same industry and know the same people, they do not need a data leak from Marriott to get your address. That has nothing to do with data leaks.
Maybe, maybe, you could conceivably piss off some Mr. Robot Darknet-wizard on a forum who would then spend hours combing through leaked data to try to figure out who you are so they could mail you some anthrax, but I'm going to put that at "get hit by an asteroid" level of things to worry about.
As far as "take the risk seriously", what is there for an individual to do? I have zero control over the data security practices of Equifax, Marriott, or any other major corporation. I can just avoid their services, but that would basically entail living completely off the grid and being a hermit. If it were something as simple as locking a door, or putting your backpack in the trunk, yeah, people would do it. But all of this "the sky is falling, freak out now!" propaganda, comes with absolutely zero actionable items that the average person can do. I'm not going to waste my life being worried about things I have no control over.