On my server there's a particular mass botter that likes to stamp his main char's name on the retainer followed by a taunt/troll phrase like <name>suckit <name>ownered <name>betterthanyou mind you there are over 24 retainers with names like this all with the same character name prefix.

Said retainers are always selling massive amounts of Tier II - Tier IV materias.

The char in question is a very disruptive player in /sh when it comes to Hunts and Fates, which leaves in my mind no doubt its the actual player taunting the server population as a whole. It's pretty easy to narrow down the bot characters producing these materias as we see them running around 24/7, with erratic, non-human behavior, killing mobs while wearing crafting/gathering gear.

I'm sure they can prove the accounts are tied together via the internet network, method and location from where payment of the accounts are made.