Yes, but I'm not talking about the boost-for-trader part of drains, I'm talking about the cut-in-victim part
I wouldn't mind a divest line that gave the trader +200 to all his skills and did -75 to mine, and a plunder line that gave the trader +300 and -150 to mine. (Just made those numbers up... but I hope it's illustrative of my argument). Buff your own skills to your heart's content... the real power, and the real problem, is the huge skill loss.
Debuffing a caster's nano skills by 50 points, let alone 200, is enough to cost them their best nanos.