Imagine you manually train an account for 1500 levels, having it be patterned to your human timings, reactions, and way of doing things.
Now imagine all of a sudden you are seen using a different client, performing actions unlike how you performed them for 1500 levels prior. Your timings are completely different. And you are taking part in a click-intensive and very boring activity like power-mining iron rocks (on a public script!), to boot. Did you expect Jagex to just forget how you played the game for 1500 levels? Did you expect them not to notice? Did you think they would not compare how you played the game for 1500 levels to how you play the game when you do a highly-botted activity? "Be careful guys" seems rather ignorant here if I'm being honest. It seems as if it was you that was not careful.