First off: What definition are you referring to because I don’t see any mentioned that would imply what you said.
Not coercive would be giving the user the option to not agree to the new terms, not coercive would be not taking the telly hostage when the user wants to use it.
If Roku did not want to coerce its users to acquiesce, why did they choose such a drastic act? Is there any reasonable other motive? In defence you might argue technical necessity or such, very likely a losing battle but you might drag out the proceedings. but even then there’s still enough initial suspicion to start the case.
And, as said: It’s certainly not the job of an ordinary citizen to figure all that out. That’s the job of police and prosecutors.