uhh, the ban frequency is quite easy to understand if you're an idiot = banned within a month or so if you're not an idiot = never banned find secluded places to grind and dont let your bot run into a wall for 20 minutes and you wont get reported =)
Its sad because when im botting i actually find people running into walls.. i use joe's profile when i grind because it has a reset and it comes in handy.