The most egregious example of trolling I've witnessed involves a case where wifi patent trolls have sued end user businesses (think hotels, coffee shops) which own and use routers. They did so intentionally because small businesses were not likely to go to court and just sent the troll money to "settle".

At least the legal system seems to have moved towards more heavily punishing blatant trolls more recently. I would hate to see what trolls get their claws sunk into if blockchain tech is heavily adopted for financial transactions.

Source for wifi trolling

http://www.essentialpatentblog.com/2013/04/innovative-wirele...