This is probably a STUPID question but...

As of right now, I haven't heard of any way to have selective looting

Z already said that leaderboard bypass only eliminates the time. Looting, ap, lvl gained and everything still gets recorded. If it makes you feel any better, I have like 3 characters who makes top 10 sometimes top 5 every single day in two categories and I haven't received a slightest problem (been botting since v2.4 came out.)

Like I said before, don't worry a slightest bit about getting banned. You'll only waste more time by trying to do unnecessary stuffs. I mean if you want to see blatant hackers just look at the 10 stacks of emp or exquisite ore they list everyday on MP. And they do it again and again and they are still around. When Nexon decides to really ban, I don't think anyone can actually "hide" from them. So yeah, that's my 2 cents.

None of you have heard of a method for selective looting because it's literally impossible to do without memory reading, and even then it may still be impossible.
We would have to know what the core is before we pick it up, and trust me, that would be NO easy task.