Anyone that tries to subject others to their control is practicing imperialism, in the modern form anyway. It used to mean something else. It's certainly not just the US, though we've done our fair share.
You can usually determine whether someone is trolling or not with some discussion. Just because someone says lgbt does not give them carte blanche to say whatever they want. If you really want to detect trolls, you need to remember some of them pretend to be lgbt just to cause more chaos.
It's not "both sides-ing" to assert that no position should be immune to criticism. No matter how underdog they are. Being an oppressed underdog should not give someone license to just do whatever the fuck they want like you're some fictional char like Batman or something.
China's system is opaque. Without allowing independent observation, aka transparency, there is just no point. I'm simply not willing to give them any extra faith. For the third time, suspicion is default. Suspicion exists until evidence to the contrary is provided. This is just a basic safety principle in the modern age and is healthier than faith-based alternatives. I know you didn't say that, incidentally, I was getting out ahead of a potential criticism before it appeared, saving us the time of having to discuss it. I was not accusing you of saying it, was I?
I think it's a very useful definition of imperialism, actually. It captures the new, informational-based methods of attack that have become so common in just the past couple decades. Economic and military (the original) imperialism are simply other methods. I am well aware that some communist thought tries to equate imperialism with global capitalism, making them identical. This is actually less useful imo.
You don't think exerting authority over foreign people is functionally a form of imperialism, in basic principle?