1.   And as children get older, they often figure out how to turn off the blocking program.

2.   Besides, so many new sites open every day, that these blocking programs must be constantly updated, and customers must pay for the privilege.

3.   There already are some excellent blocking programs for businesses, and there is the thought that a workable blocking package for consumers will be a blockbuster of a product.

4.   Triangle Boy presents a problem for blocking programs, which have to try to stamp out moving targets because the information is no longer stored on central servers.

5.   Clarke will join the blocking program next week, holding up at meetings of EU finance ministers agreement on loans to Asia and Latin America and an anti-fraud program.