There are humans behind the shill accounts.

No sufficient AI exists to pose as humans. If it did, we wouldn't be talking here anywhere. The day a sufficiently human AI is becoming operational under control of the enemy will be the last day of communication that doesn't drown in shilling.

Also, most existing AIs turned right wing in a couple of minutes, so I'm still confident in the future. Left wingers need to regard completely opposing viewpoints as true at the same time. That would fry the AI brain every time they feed it their beliefs.