Vicki at I Love Orange has posted some pictures of garlic mustard with a (correct) exhortation to tear out this invasive weed whenever you see it. And here's an even better idea, from the Brooklyn Botanical Garden: eat it!
Think delicious winter invasive-plant salads, mouth-watering invasive-plant omelets, or perfectly cooked pastas infused with invasive-plant pesto.
Rather like eating the body of one's enemy killed in battle as a way of humiliating the enemy. E-e-e-excellent (rubbing hands together nefariously).
On the other hand, I've been waging a ten-year battle against Bishop's Weed, a rather pretty and very—ahem—vigorous plant which has been trying to take over my entire back yard. Over the years I've tried poisoning it with glyphosate (Round-Up), I've tried smothering it under old shower curtains and several feet of leaf mulch, I've tried picking it and pulling it and digging it up bit by bit, but however fast I worked at its destruction, it could grow even faster.
At some point I discovered that Bishop's Weed, too, is edible, having started cultivated life as a pot herb in England. This didn't surprise me since it has an astringent fragrance which would be not unpleasant under normal circumstances. However, when I steamed some up for dinner, I learned that the hours I had spent crouched in the yard, scrabbling in the dirt to remove every shred of root of this despised plant, had conceived a hatred in me so intense that I couldn't bring myself to eat it, however humiliating it might have been for my enemy.
This story has a happy ending, sort of. After our house was raised and our yard was razed, the Bishop's Weed has been greatly reduced, so that now all I have to do is stay vigilant and keep my trigger finger on the Round-Up, and victory is in sight.