Unfortunately, JM seems to simply ban many accounts at once, which makes some good PR since they can make posts like "134908 bots banned, see the list below"
That doesn't stop botters from making new accounts and making another bot.
I've even heard a story of someone using a bot, getting tagged by a GM, but being let go because the player was:
1- actively watching his bot and engaging in conversation
2- buying silk (item gathering pet, I think)
idk if it is true, but why lie?