Personally, I think it's counterproductive 90% of the time.

I have used it once out of being annoyed at a post, and used it once to correct somebody that spammed my post with an ad...in that case, I left a comment explaining why I flagged him, and told him I'd remove the flag when he removed the flag. That worked, and I removed the flag.

Th e other part of the flag is this, as a new user with a low rep and low Steem Power the flag is not going to have a lot of effect.

But don't hesitate to use if t if someone is really harassing you either! If somebody is being insulting and personal, flag em!

Other than that. mute will work.