I've heard of chainbans, Personally I've got a total of 3 accounts banned, The first account I ever got banned it started off as a temp ban then I decided I really could care less and tried another script and ended up getting perm banned. I made 2 other accounts after put bonds on at level 3 and they got perm banned right off the bat. So i'm not sure if that has something to do with my IP or maybe it was just the level and script I was using. My first account that got the 2nd chance I did a few quests on, And was just using a autofighter and did a little work on, Had some cash and a dragon defender aswell. But the other 2 I just put bonds on and started spinning flax, and the other minning, Since then i've only really used the premium NMZ bots from here and they work like a charm, I've done training services for people using the nmz script and not once ever got banned. I use VPNS now and bounce around from botting at home and work aswell. But the nmz is flawless.
Hope that helped a tad.