Problem: NO single approach is perfect
Rating & labeling websites depends on provider cooperation
- Commercial providers may well comply
- Amateurs, clubs, foreign sites would not comply
Firewall and similar technologies, depend on IP addresses
- IP addresses are large in number, change rapidly and cannot be controlled
Checking for text is easily bypassed
- the choices for indicative terms are wide, will create false constraints
- suggestive terms can be hidden in images
- however, commercial sites will want to be found
Checking of image content [WIPE] also create false hits
Websites using pirate processes can be recognized and included in bad-lists
- disabling exit means, hijacking browser BACK buttons, excessive stickyness
Combining multiple technologies can improve the performance
It is easier to identify objectionable websites than to filter individual pages
- Broadband speeds are difficult to match by processing technology