Biggest mistake most librefication projects make is to do their project out in the open where they can easily be subject to legal pressure, then fall into complete disarray the moment that pressure appears. They can't move underground once pressure starts, because everyone already knows who they are.
You propose the open-source community operates behind closed doors like the very software they aim to replace?
I’d argue Spotify has so little to gain by being hostile, that perhaps the lawyers are more expensive than just ignoring these pet projects (which would never gain mass adoption).