Kill the "BOTs"

[tymora]

I would think the farming bots will be pretty obvious - Fixed farming pattern, comes hit your claimed mobs if you claim it after they locked on to the target, farm till their weapons hit 0%, farm for inhuman number of hours...etc etc

Or the Lalafell armies that run around?

Crafting bots not so much since we regular crafters turn on human-bot mode and watch TV.

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I believe another game also made a small unannounced and sudden UI change to their crafting interface. A number of botters didn't notice the change and continued to run their bots which caused them to hit a changed/imaginary button on the screen, effectively telling the server - "Hi there, ban me please".

Things they can do...
1) Replace Standard with "Ban me please" for 24 hours and revert it back after they kill off the botters. I doubt regular players will mind it the short term inconvenience if it meant the end of bots.
2) Move the menu selection from left to right side. Regular players can still spam standard as they did before. Screen position based bots will be detected.

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Even without special in-game changes, less advanced bots can also be detected by checking input patterns.

There are entire papers devoted to the arms race between bots and bot detectors, so this is as simple as it sounds.