Although apparantly they seriously underestimate how long they spend using them.
UK parents believe their children are online for 18.8 hours per month. The true figure is 43.5 hoursYeah, OK. Given that viruses seem to be rife on home machines that suggests many parents can't manage to install and update antivirus. If they can't do that then how do they know what their kids are doing?
From: Children work round web controls, BBC website 18/03/2009
Although it seems that Geek Mums are on the rise. Maybe there's hope then.