>> Patent trolls have no political clout. Zero chance of police arresting someone on their behalf (let alone them calling police to request this).

But they have rich guys behind them. What if they decide to make "an example" of me, to scare everyone in the US and abroad and convince them to give in and just pay extortion money to them? Right know every non-US company just ignores them and that's huge potential money to be made. It cannot be done through European courts for instance but they could use another intimidation tactic like making the IT community know that everyone who doesn't pay to the trolls will be arrested if he ever crosses the US border. That would be a very profitable venture.