Bugs killed MI in the books, too, yes...but if you read carefully the bugs had weapons.
That damn movie really cheesed me off. I wondered how they would handle the very conservative political philosophy of the book. I figured they would ignore it. Nooo...I forgot how Hollywood deals with such things- they just turned it into a farce.
As to bug-hunting with Ripley? Take a page from her own book:
Nuke 'em from orbit.
Mike
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"A human being should be able to change a diaper, plan an invasion, butcher a hog, conn a ship, design a building, write a sonnet, balance accounts, build a wall, set a bone, comfort the dying, take orders, give orders, cooperate, act alone, solve equations, analyze a new problem, pitch manure, program a computer, cook a tasty meal, fight efficiently, die gallantly. Specialization is for insects." -Robert Heinlein