1.   Schools are often the target for petty acts of vandalism and urban schools in particular sometimes suffer from graffiti attacks.

2.   Unreported hacking cases can be as dull as garden-variety Web-site graffiti attacks or as harrowing as full-blown network invasions.

3.   The monument was further tarnished by a recent graffiti attack.

4.   A group of AIDS campaigners were arrested and questioned Thursday after a graffiti attack on a government ministry building, officials said.