If it's "safe to say", then there should be some statistical evidence backing this up, no?
At least in terms of viruses (the most common means of infiltrating a home computer), the percentage of households affected by any kind of computer virus is 40% according to http://www.statisticbrain.com/computer-virus-statistics/ (which in turn comes from data from Microsoft and Panda Security, among other places). This doesn't seem to define what "affected" means, however; it could mean that at least one computer was infected, or it could mean that they received a bit of spam from a non-household family member or friend whose computer was compromised.
At least in terms of viruses (the most common means of infiltrating a home computer), the percentage of households affected by any kind of computer virus is 40% according to http://www.statisticbrain.com/computer-virus-statistics/ (which in turn comes from data from Microsoft and Panda Security, among other places). This doesn't seem to define what "affected" means, however; it could mean that at least one computer was infected, or it could mean that they received a bit of spam from a non-household family member or friend whose computer was compromised.