There are low-risk areas, I botted F2P 1-85 strength then finally i was reported and banned. However there is no list for such area's as this would defeat the purpose.
edit: I would say your best chance at not being banned is doing exactly what I did if you want to train combat, walk around runescape and find the most random place to train where you will see minimal amounts of players. Find an unpopular monster that can grant you decent experience and stick with it. Tell no one about the area at all.