If you wrote down the number Pi in hexadecimal, I conjecture that any possible 40-digit sequence would appear in there somewhere.
Indeed, how could it possibly be illegal to share pieces of Pi? :)
Indeed, how could it possibly be illegal to share pieces of Pi? :)
What if they share positional information from a known sequence: pi[3000:3040].
OTOH assume knlowedge of nothing but the magnet link list torrent file, if you just downloaded the linked torrent files without to procede to download when in doubt about copyright infringement, that woould not be careless.
Your argument extends to how can any string of data be illegal, putting copyright into question, but that's a different debate.