Has there been any discussion around having a negative merit thing? Like something that costs 100 merit to deliver 1 stab or something. Obviously there are tools like the trust system, but the focus of the trust system is on fraud or at least trust worthy behavior. Someone can be not untrustworthy but still be deserving of a swift kick in the groin.
I honestly don't want to open this can of worms, and I am sure this member won't care any merit deduction, 100, 1000 or 10.000 negative merits.
You can use one nice remedy called ignore button, than just stop reading all his posts and stop responding to him.
Many of us are doing that and it works very good.