1. Botting is always feasible if you do it correctly, most of these bans are coming from things like botting stupid hours, flagged IP's and high ban rate skills. I myself have got cooking, fletching and nearly hunter (96 now) through my scripts with not even a 2 day ban yet
2. I would try, certainly wouldn't hurt
3. We are always looking for new ways to combat the ban rate but we don't exactly know how Jagex detect them now, if anyone in the botting industry knew this then that would be the most successful client to date