I suspect that these tools are all looking at the world's largest social networks with 9-10 figure user bases. The same argument applies to them: they're too big. None of them should exist. Once you break it down to thousands or millions of different platforms, each with much smaller user bases, it becomes prohibitively expensive to surveil them all.
> We kinda want law enforcement to know if Jimmy Bullets just posted that he's gonna shoot up grade 4 English tomorrow.
Has this ever prevented a shooting? They always find these posts after the fact.