Is it possible to stop pillagers from spawning at an outpost? I've killed all the pillagers including the leader but they just keep respawning. Can't find a banner anywhere on the tower. What needs to be done to stop the spawning?
I would first try completely obliterating the tower. Next I would cover the terrain in something that they couldn't spawn on. If not that, I would completely block/quarantine the area off. I'm interested to know what the actual solution is, these are just the ideas of a bored man.
Most-best - possible - use of Lava, ever..? The trick with Water-alone is they Seem to Follow me up to at least 100( 'ish) Blocks away (very roughly: Illager Patrols seem to stay-still and be-aware of me about 32 Blocks away; so stop-Patrol'ling onwards), once they've Targeted me.
I'd thought I could continue a Grass Path route within about 200 or-less Blocks of them (their Pillager Outpost, of Re-Spawning), Build a Bridge over the River which thankfully wrapped-around them about 120º (that's 1 /3rd of 360º of a full-circle), but even though the River slows them down (since an Update in the far-distant now past which Slowed all-Mobs including the Player a bit, in Water, dramatically), I Still have to move-away from them quickly, once I get-away on Land. And on Land it was impossible: so I'd only ever easily be-able to Build the Bridge from the "safe(R)" side.
I'd recommend what my plan was: Build "safehouses" (with Escape Tunnels, somewhat-more easier since now-at least Trapdoors and 2-high Fence Gates, one-Closes when-in the Block, makes one start-Crawling at 1-high; slower: but less- Digging /Mining, to Build one, going-sideways [dunno if we can Crawl-Jump, haven't tested-fully to go 1-Block high while-Crawling]). Join them up (that's how I'd Build the Bridge, which might as well be an Underwater-too Tunnel, at that point meh, "Pillager Outpost, 'Chunnel'"), and gradually find-where you can Build a Wall in-between (find their Spawn-Range from the Pillager Outpost in the Wiki, it might be 64+ Blocks, dunno).
So Ring them in - at least - and then decide. "To Lava or not to Lava?"