They reverse engineer a protocol, built an app for it, bought a domain with a single character (s -> z) difference (cyber-squatting) and are charging for it.
And it isn't a "clear violation of trademark law" either, almost nothing is clear in trademark law until a court makes a ruling.
Regardless, fine, big corporations will do what big corporations will do. I don't think the Bozeapp guy is risking anything other than having to change the name, or possibly pull the app. Big deal. "Hope you hire lawyers" is an extreme comment.
I wish more of us in communities like this would cheer on the little guy, rather than jumping to the defense of big litigious companies (before they have even acted). Reverse engineering a protocol, because the big company didn't bother accommodating your device, seems well within the spirit of a forum called "Hacker News." To me, reverse engineering a protocol so you can add functionality is no different from what hot rodders have done to their automobile engines for a century. You're figuring out how it works so you can make it work more to your liking.
(and yes, in my opinion it is totally a David and Goliath situation)
None of these things are crimes.
Perhaps, but no one is talking about criminal charges. Torts, like the trademark violation here, are still illegal and a basis for legal consequences, you just don’t get prison, death, or other uniquely-criminal penalties for them.
Good chance Bose will be aware of the bad publicity it would create to be too aggressive about this, it just would make them look bad for not providing such a thing in the first place. They have to defend their trademark, yeah, but unless this is actually a well known product, they aren't at risk of it being genericized.