Just pulling up one example...

Iiii Iiii on Rabanastre completed 5000 leves on October 30th and on November 18th had completed 10000 leves.
5000 leves per 19 days = 263 leves per day = 11 leves per hour

Which is one leve about every 5 minutes - generally a good completion time - non-stop for 19 days.

2nd example: Cheese Ice on Istory did the same thing in just 9 days. Think 2-3 minute leve completions 24/7. That's not human.

You'd think there would be an automatic bot-detection system for this sort of thing...

For comparison, this is a player who I can testify completed almost everything in the game legitimately. It takes a while.