I'm in DATA/ANALYTICS and it's not hard to connect the dot's here.
It's not hard really to understand where your items come from. I always check the signature on an item....if it even LOOKS suspicious it's a bot. i.e. I have seen "Signature Notfound" "Obtaining Signature" .....really? that's the name you came up with when you "started" the game. I will now start reporting suspicious names, and if the data proves unsubstantiated then I suppose I was wrong, but if I was right...well. As for me I usually get in bidding wars with player characters with "suspicious names" more often then not, and the amount of gil is important to me as I spent real time, energy, gil, and crafting mats to get everything together.
When I post something I usually place it above the lowest kind of in the middle, but to check back 8 hours later to see, the market has imploded and undercut to smithereens. This isn't normal behavior for players that put in the time and GIL to turn a profit to destroy there own market. This is the WORST haggling tactics ever scene where the seller pays the buyer to take it off their hands.
Come on this isn't hard to report this crap. From a data mining standpoint it's even EASIER to investigate the item time stamps, trades, gil transfers, mail logs. A simple excel spread sheet can figure this out, and I consider medium level excel proficiency can find the data we need. I would go out on a limb here and say the TOP 10 earners on any server....5 of those are bots if you compare the names, and amount of time playing.
Just look at one player with that kind of name...and start sifting through the timestamps. If they aren't paying for trades of RARE materials from one player to another....hmmm suspicious. If the player account doesn't move for DAYS on end from the summoning bell... hmmmm. If the summoning bell click/execute is used EXCESSIVE times per hour. Multiple alt's...with 5 retainers EACH...every retainer packed to the gills with items, and the player character constantly logging in and out.
All of this is unnatural behavior for even a PRO gathering/crafting person, and if you deny this your probably promoting bot accounts.