"Any behaviour that makes Steemit a poor experience and drives away users shouldn't be seen as acceptable."

That is exactly what I feel about his spam.

"if someone is flagging your posts regardless of content"

Flags done by me: 0
His flags against me: 4

So why should I care if he is flagged by @berniesanders?
From my personal experience with
@matrixdweller (since my yesterday's comment) I could assume, that those flags he is already receiving are well deserved.

Actually, maybe I should return a favor?