It would be great if VCs created funds / departments to fight trolls attacking their portfolio. I understand that there are many issues with this model. But it might just work. Especially for accelerators like YC. I think word would get around quickly to "not touch YC companies" and the expense would go to zero. It would also be easy for YC to decide what is a troll and what is legit.
The problem is that even if VCs hate patent trolls when directly affected by them, they don’t actually hate patents, and in fact try to make their portfolio companies patent everything under the sun.