Haven't used soulseek in about a decade, so things might have changed, but back then my workaround was this: I search for what I want, find a person who's sharing it, and if their library was good I'd allow them to see my library before downloading from them.
So basically I'd share with folks I downloaded from, but not the general public. Not foolproof, but drastically reduced chance that somebody with a well-curated library was there just to prosecute.
This wasn't Macron