1. Botting exist because it is real world money in this it affects all large MMO's with a market hub. This real money is of course evading taxes we are talking about over the last 2 decades billions of dollars in various games.
This money is used for probably all types of crime. This is the sole purpose of botting in WoW, Eve-Online and FFXIV that is affected by this plague. In Wow they do nothing, same in Eve-Online.
I bet it has been numerous debates within the FFXIV team and SQE.
2a Actions of diminishing trade.
Gamer Mr A Botb is has a mule at lvl 10. He sells items way over his station move them from Company chest to his ten retainers.
2b Solution:
FFXIV makes it impossible for him to buy or trade items above their level.
A bot crafter usually got lvl 1 harvesting. Solution he can't trade or buy any item higher than lvl 1, or lvl 2. etc
This new system laws will crash the whole bot system market trade both from MB and of course internally within the FC. The bots will be forced to level up all their mules.
This will make it even easier for FFXIV Task Force Team to locate and terminate them.
More gamers will be able to get access to the wealth that the bots steals from the game and scam dollars in real life.
3 Crystals.
Here you can make many changes, the easiest is to remove it all from Mb and sell them from Crystal Vendors. Another easy solution is that mobs also drops crystals.
As a surplus to Vendors. Problem solved.
4. Materia and bot grinding it.
It is clearly bots only doing one thing, grinding Math for Materia.
With the rules from above, the diminishing trade will make a massive hiccup.
So I suggest that to Tribes, Scrips etc., you make vendors here do the same that sells Crystals also sells Materia to a fair price, thus removing it completely from the market board.
5. Fake melds/bad melds.
At the market board world wide bots and others me included sells High End Items with crap meld. 3x High end Materia, the rest is rubbish.
Solution: A new game law, it is impossible to meld crap into High end, for level 90/80 items, you cant put in level 70 or lower etc.
Materia becomes level based.
6. Market board.
With enforcing a new law Mr Bot A Botb tries himself or with mules to travel stocked up with crafted armor items from Cerberus to Omega he gets denied travelling.
Crafted none bound armor etc gets server bound.
Thus the plague from Cerberus server is stopped. Then the bots will of course try to travel with Math and easy for FFXIV Task Force Team to see whom and hereby detect mules. And Terminate them and the Fc.
7. Enforced downtime.
For example Every Thursday 11-12 downtime, scanning the database for strange gillies traffic, mules with math etc. Scan complete, x-accounts is terminated.