She is not a newbie. She knows what she's doing with these posts - farming rewards, nothing else.

A downvote is not a flag. A downvote is a reward adjustment. That's how the distribution algorithm works, did you read the whitepaper?

Why should I as a witness not use the blockchain in the way it was intended? Being a witness is about running a node for the chain, being independent and reliable. Caring about anyone's rewards is not part of the job description.