>>4
>>5
Not only did they not have any kind of antivirus, they didn't provide any kind of memory protection; they were revered by their users precisely for the lack thereof.
Lisp has historically been maximalist about dynamicity, at the expense of encapsulation. It's only now, with Strandh's SICL and associated work, that the community has come to take encapsulation and security seriously. (and, even so, it's at a coarse granularity of "separating worlds")