Heavily staked means 'large steem power holders'.

Thank you for explaining this to me.

Yes, this is the case and what the flag is meant for. The people using it as an attack on a person don't use it well in my opinion.

Yes I agree with you and I think we can call this kind of attitude of abusing too.
I think this kind of attitude may be one of the reason that can cause this community to collapse someday. I hope not.