It's not so much that they use it, they use it quite often actually, its just that this last time I walk into the room and from a distance I see an antivirus warning pop up and get blindly cleared/allowed/whatever without even as much as a pause to see what was happening...
You can imagine I had a few things to say about that... I know they're not going to be that stupid in the future, but still... Damage was already done.
='(
Not buying them their own computer, let their mom/own parents do that.