I added $weetne$$ to my ignore list but I don't see a strong connection between these accounts to be Merit farming.
Even if it were, I don't think it's a problem as long as there is no merit source. In the end, their generation of sMerits will be limited, and they will be added to the ignore list of many.
The number of merits distributed by merit source monthly continues to drop, if you check the DdmrDdmr merit dashboard which is a clear fact that most merit source don't even use much of their allocated Merits because of low quality post and issues like this.
In general, as long as many accounts can rank-up during allocated activity, I do not think a change should be made.