I'm curious; we don't have this problem on most Japanese servers so I've never had to deal with the nightmare of a blacklist limit, but the other day someone was spamming about RMT (in English, hahaha) by Limsa Lominsa's MB. I reported them using the link about RMT in the first page of the support desk screen and I received a reply almost immediately advising that if I had blacklisted the person I could now remove them from my blacklist as they were being dealt with.
I don't know whether this meant they had been banned immediately or whether they'd just been muted (possibly without knowing) at S-E's end while they investigated, but it seems like a good alternative. It's a shame the reporting interface is really clunky, especially for console users. A streamlined reporting interface would make it so much easier.
