Thing is ..if they can't get on "the net"..how would they "report" anything..:)
If they have access to another machine and try to find out what is "wrong" by typing say "why can't I get on the net"..they'll find out ..realise that they were infected for a long long time ..probably via surfing pron or warez..and that questions might be asked.. :)
Are they going to tell ?
Or are the local PC repair shops just going to get an influx of .."can you fix this" ..
I've cleaned machines of "nasties" picked up whilst their owners were surfing for pron and warez and clicking on anything and everything ..told them that their history told me or anyone else what they had been doing, and where they had been going and what they had been searching..( only found one instance of a machine with temp files full of searches for and pics of child pron, and reported it immediately to mates in the Gendarmerie ) ..and that is just like most of us.. "fixing machines for people that we know" and who ask if we can have a look ( software or hardware )..not running a pc repair shop..
It's the kind of thing that you might mention in passing in a tech fora one day ..or not ..but you are not going to report every instance..nor are the PC repair shops ..they have better things to do..
"silent stats" ..just like the people who abandon shopping carts etc without ever saying why..happens ..but they don't make a song and dance about it..