EzekielRaiden
Follower of the Way
As above, I cannot comment on specifically Blades in the Dark having never played it myself, but I can speak for Dungeon World, having years of experience with it.So first I want to say this was an one-off event and the GM admitted they did not handle it well. Overall it has been a good campaign.
And yeah, it was a tad frustrating when it happened, but I also think it was interesting. It was produced by "secret myth" thinking clashing with a system that assumes pretty light myth. And the GMs thinking was logical. there were previous events that had occurred, that had tipped off our enemies. It made sense. Still, it did not work with how the game is structured.
I believe our GM thinks in terms of "secret myth" quite a bit. Like there are secrets and conspiracies we have uncovered and whilst the details may have been flexible, I assume most of them were preplanned way before we found about them in the game. Similarly NPCs and factions seem to do things based on their own plans and motivations and that produces events visible to us players. I am not sure how much this sort of thinking one is supposed to do when running a game like this. Like there are all these established factions and some named NPCs and they have their goals and stuff. But instead of as active forces with their own volition, should they actually be treated as fodder for fiction when the dice or player actions demand it?
There is a tension in the written rules, for DW, between the high-level Principle "play to find out what happens" (which pushes toward a "no-myth" approach) and the How To GM instruction "exploit your prep" (which pushes away from absolute no-myth). Here's a bit of relevant text which seems to fit, to some extent, with what you've described here (emphasis in original):
"In all of these things, exploit your prep. At times you’ll know something the players don’t yet know. You can use that knowledge to help you make moves. Maybe the wizard tries to cast a spell and draws unwanted attention. They don’t know that the attention that just fell on them was the ominous gaze of a demon waiting two levels below, but you do."
So, in some sense, yes. Things like what you describe should exist. DW refers to "Fronts", from the phrase "fighting on multiple fronts". Fronts are meant to ensure that the players are never truly, absolutely safe; they are always at some risk of peril, even if it's still a ways off. Fronts often involve factions or organizations with goals that may or may not be good for the PCs (usually, at least a mix of both good and bad, but often just bad). These Fronts progress through various Grim Portents: events that signal the gradual progression and worsening of the Front until either the players defeat the problem, or its final fruition occurs.
Looking up Blades' rules, it looks like Factions are specifically meant to be a part of play, but again I haven't played the game myself, so I might not fully understand how they're supposed to be used. However, based on what I'm reading from others on it, it sounds like the Factions are what Blades uses instead of Fronts to drive long-term conflict. You need your Scores in order to, y'know, have money and such, so that would still happen. But Factions can like or dislike you, can aid or hinder you, and can even be "At War" with you, which severely hampers Scores and downtime.