The rule is still present in your time, as it was in ours
Alt text: pictures of suburban neighborhoods and homes with text over it that reads: “this is no place of honor. No esteemed deed is commemorated here. What is here is dangerous and repulsive to us. Turn back.”
The funny thing about this is that they're designing it to warn of the danger, but humans always have been and always will be curious about the danger. If being dangerous and scary was enough to keep humans away, then nobody would have ever messed with fire. One day, someone will try to dig this stuff up. Maybe they'll have figured out a way to use it. Maybe not. But they will try because humans are much too smart and stupid for their own good.