But in my point of view Flagging can never be a good idea, because it can hurt your ego, and if your ego is hurt, then you can't do good. They will keep flagging you, I know their flag worth nothing, but it still irritates you.
yeah, ignoring can be a solution but here also we need to explain each and everything first then and if they don't work correctly then we have this option, thanks for your view @sarah249