Actually, the real win for whoever actually got such a patent would be the "no tagbacks" effect.
Imagine for a moment that you were sued over a product or service another party claims infringes a patent of theirs. Then, you found out that some product they offer actually infringes one of your patents. Now, you're thinking you've got leverage to negotiate a settlement, but the other party refuses all your offers, until you're finally left with no choice to countersue. That's when you find out they actually have the patent on patent trolling! Not only can they sue anyone they like for the slightest whiff of possible infringement, but the defendant can't fight back without actually violating another patent!
Imagine for a moment that you were sued over a product or service another party claims infringes a patent of theirs. Then, you found out that some product they offer actually infringes one of your patents. Now, you're thinking you've got leverage to negotiate a settlement, but the other party refuses all your offers, until you're finally left with no choice to countersue. That's when you find out they actually have the patent on patent trolling! Not only can they sue anyone they like for the slightest whiff of possible infringement, but the defendant can't fight back without actually violating another patent!
Quite the trump card, if you can get it.