Pressure builds on social-networking websites to do more to block such content. Legislation is afoot, too.
Since 2004, 159 court actions have targeted citizen journalists for libel and other charges.
Direct marketing is big business online. But this business shift has privacy advocates worried.
The arrest of Fouad al-Farhan, one of the few bloggers to use his own name, may be an attempt to intimidate others.
Bringing Internet openness to the closed wireless world is bold but difficult, analysts say.