No... I think that would really be completely over the line. A Rogue Trader might do it, but an Ordo Xenos inquisitor? I don't think so. Eisenhorn, in "Xenos", makes a note about engaging pursuits against a merchant guild because they sell Xeno grain!
Maybe an extremely radical Ordo Xenos inquisitor would do it... "fight the enemy with his own weapons" sorta thing. But it seems extreme.