One does not simply quit runescape.
About the ban rate question:
It is still very high, depending on the skill, area, scrip you use.
The best is if you choose a script, to read the threads of each script and see what other users used to comment.
I would start the account legit till you hit a few lvl's. Or maybe you even remember an old account you made? No matter if it has stats
Jagex monitores new accounts very close. (Keep in mind that this is my personal opinion)
Good luck!