The warning widens the possible fallout from the expected campaign by Saudi women to get behind the wheel on Saturday in defiance of Saudi traditions. The Internet has been a key tool in organizing the protest and reaching out to media.
Friday's edition of the pan-Arab newspaper Al-Hayat quotes Saudi Interior Ministry spokesman Turki al-Faisal as saying cyber-laws could apply to anyone supporting the women driving campaign. Conviction can bring up to five-year prison sentences.
Though no specific law bans women from driving, the rules are enforced by Saudi Arabia's powerful Islamic establishment.