Patent trolls definitionally don't produce anything, so aren't going to run afoul of other patents. Squatting on shitty patents might be a good idea to prevent

Patent trolls definitionally don't produce anything, so aren't going to run afoul of other patents. Squatting on shitty patents might be a good idea to prevent them from ever getting into a troll's portfolio, but it might be a good idea just to put the money towards invalidating patents that the biggest trolls use to extort money out of companies.