content: Yes, and no. They're called "filters" but are just DNS level domain blocking. The filters are opt-in at the ISP level (i.e each ISP has to agree to implement them and are not legally required to do so). If you choose an ISP that implemented the filters then you have to choose if you want the filters or not when you activate your service. It's only the three or four most "mainstream" ISP's that implemented the filter so it's really about consumer awareness and choice. There are several ISP's that have publicly announced they will never implement the filters even if they're passed as law.