1.   But hackers made deeper inroads into the Senate computer system, leaving an obscene message on Thursday that said the intrusion was in response to the FBI raids.

2.   Experts say hackers could have made these bugs much nastier.

3.   Hackers still make attempts from Johnson County Library computers, King said, and cautioned that no system is entirely hacker-proof.

4.   In such cases, hackers can make those hidden form fields visible, and use them to gain access to roped-off areas of the site.

5.   The appliances do not communicate with computers or the Internet, so it is harder for hackers to make the contents public over the Web.

6.   Viruses have caused corporate e-mail servers to crash, and hackers have made Web sites temporarily unavailable.