Well people not getting actioned is on Blizzard, and/or they are just not getting reported as much as you think they are/should be by others. Like it was said above, there is a special place for people like this, you click on game menu > Support > Contact support > in-game issue > report player > ongoing harassment.
Either way it isn’t a valid enough reason to remove linking 2 RP servers for the benefit of the majority. Especially as stated above, now that cross-faction guilds are a thing, this could be an entirely new community just waiting to grow.