To be honest, to me a temp ban is basically a perm ban. I will just throw away an account that I got temp banned on and just start over because I don't feel like waiting 14 days and it's possible they will just monitor that account from now on, so I don't feel like risking paying for membership again if its just going to get banned again soon.
So I checked and 2 out of my 50+ sorc bots have been banned. I'm guessing those 2 accounts were in the same world or something and they did a world sweep perhaps.
The fact that i've suicided for almost 2 months with no ban on one account and have been banned for botting less then a week on another account just leads me to believe jagex doesn't monitor playing time. They most likely only base their bans off of random fails and reports.