It also means the Mods have to track behavior, if the person making infraction has a reputation of doing this, have others reported them, and of course the evidence of the posts reported.That I feel can be freely debated.
Basically start from a basic definition of terms, and then severity.
The tension though is adding tools to deal with said behavior without making good members walk on egg shells worrying if they will be perceived as harassing; Shoutbox could in essence go quiet if too severe of a amendment is passed.
Finding the balance of stopping bullying/harassment/flamming without making people fear they will mistakenly be percieved as such and giving them a means to make their case too, to either explain they meant no offense in earnest or apologize and make restitution by good behavior from then on.