This is fun... In Stichting Brein v. X and Y last month, the court in The Hague imposed "lijfsdwang", i.e. civil detention, as an enforcement mechanism against two incorrigible IPR violators. They have to spend a day in jail for every 10 illegal copies they are caught with, with a maximum of 10 days per bust, and a maximum of 10 days per month. (That is to say that they won't have to spend more than 10 days in jail in any given month. The number of days imposed can be more.)
As far as I know, civil detention is exceedingly rare in the Netherlands. (And elsewhere.) I guess the Copyrights people are getting desperate.