Tiscali will rue the day...
...their active filtering fails (which it absolutely will) and some kid tops themselves purportedly because they looked at a suicide site and it fractured their tiny little mind. Cue lawsuits and a world of hurt.
How many more times does it have to be said? Its the responsibility of the PARENTS to monitor access. The ISPs can give them tools, but they shouldn't be responsible for controlling access to legal content (illegal content is a different matter, but is already managed).