We had one the other day call us. Mrs JFH kept him talking and asked him why he was trying to scam us (we have no Microsoft products), our little one was making a noise in the background and the scammer said "sorry I can't talk anymore because you child is so naughty".
Not just on the phone either, had to take my PC in for service recently and they said there are loads on the net offering optimisation and shit then installing malware. Pensioner had 3 trojans that slipped past his Macafee virus stopper after downloading some prog. They have a list in reception of the firms to avoid re net security, Macafee & Norton being top of the list.