There's a ton of asymmetry that makes this not work. One, patent trolls are "non-practicing entities". They don't build anything, or do anything other than sue

There's a ton of asymmetry that makes this not work. One, patent trolls are "non-practicing entities". They don't build anything, or do anything other than sue people, so you can t sue them for infringement of patents. Two they shard their portfolio into very small chunks, often one patent per company. If you knock down one patent, you just take out that one patent. Three, they are usually run by lawyers, so their cost to attack is just their time, whereas you'll have to hire an attorney at market rate to respond. Four, if things get hairy, they can almost always just dismiss the case, and then you lose any claim you have against them, because they're not suing you any more. It's tricky to get counterclaims set up so you can continue grinding them down after they try to dismiss - and it will cost you money. And, at the end of the day, you'll at best invalidate their one patent.