There was a special time in the XP heyday before WiFi routers (hell, just routers even) were common for home users. Without some kind of AV, loads of folk were basically just rawdogging the Internet with ADSL modems.
Simply being connected this way long enough at the height of the MS Blaster worm would almost guarantee a drive-by infection.
With any luck, they’ll take some of the users bailing out of Reddit on the nostalgia factor, become mediocre, and die. Again.