Why does he have an issue with Jurassic Park? Lex was using fsn, which would have been available at the time for IRIX - although not used in any serious production environments that I'm aware of.
If she'd piped ps through grep into kill then nobody would have ever mentioned it again.
It really wasn't that bad - not quite as super slick as OS installs these days but most of the grief tended to come from having to do things like install it from a stack of floppy disks.
I did find the scene ridiculous at the time but it was because I didn't know UNIX or fsn. Now I find it very plausible.