I don't know whether to call it dramatic, I would say extremist. is it possible for this to happen? Of course they do, but I don't think it will be like that on this occasion. Well, I don't know, I'm not living minute by minute of what happens to marchoffmann.
EFI malware is very possible, and there are viruses floating out on the internet that will infect UEFI if your firmware isn't updated. Most of the time Windows will update said firmware, but some computers don't give Windows that access, so you're stuck with an outdated version and then a virus comes along and whoops.