While downvoting sounds like a great equalizer, in fact it will encourage a rage reaction in the person on the receiving end, and they will most likely retaliate by downvoting (flagging) those who downvoted them...see where this is going it's a vicious circle, the better thing would be to leave comments trying to be helpful. I don't support spam commenting and I don't do it.
To anyone reading this comment If you want to be a valued member here on Steemit DON"T SPAM it is not good for you or for Steemit, and it is antisocial behaviour.
It won't work well for you. Maybe in the short term you will win but you will more likely be hated and will never rise to the level you hope to attain.
To those who comment without spam, the community thanks you.