I think its patterns and type of scripts you're running for how long... i've been botting for the time I would play legit 2/3/4 hours agil, do some quests splash for 6 hours or so and try look legit as possible i'm sure they have stats and when you're running complex skills such as agility I would assume it would put you in the top % of players for hours played on that skill on that course at your level etc that day which could result in your account being looked at closer... Just my idea anyway