I still have my first computer:
A million years ago, in my college's Microcoding class, we had a lab where 1/2 the class needed to write viruses for the 6800, and the other 1/2 had to figure out how to clean them off.
Back when the only means of propagation was floppy disks and walking around from computer to computer .... it was pretty safe. :-)
WBill Jr. has a Raspberry Pi that he's been playing with. One day, I'll sit down and start messing with one, myself, it looks like a fun toy.