If anyone at Spotify is reading this, I just cancelled my account. You guys deserve considerably less money than you have now, but this is the best I can do.
It's not a great move, but I don't think it calls for wishing harm on anyone, let alone a majority of people who at most had a hand in making something you did feel was useful enough to pay for.
It was possible to drive in silence before and it's possible now. Perhaps explore a radio station.
I have personal grievances with my iPad, but I'm not about to say "If anyone at Apple is listening, I hope you do worse financially".
I presume they were a bit upset and chose overly broad language, it's not a big deal either way, I don't believe they truly wanted harm on anyone, it just seemed like a silly tone to choose.
Who is advocating berating staff? I don't see that in OPs post, nor my own. No one suggests being aggressive towards anyone. Saying the company deserves less money is a capitalistic statement aimed at the corporation, not its diligent employees. You're welcome to to silently withdraw your money from a place of business and leave them with no feedback as to why. But 'posturing' about the reasons of a boycott while also withdrawing money is a great way to attach feedback to an action the company might actually listen to.