Let me tell you about my own memories from that (non)event.
As you should know by now, it was mostly a marketing stunt started by John McAfee... 1/
Well, Michelangelo was actually in the wild.
And we did clean up a lot. It was a bit like the Y2K problem - overhyped, but real.
A few weeks before The Date, my prof goes on national TV, talks about the thing, and, among other things, mentions this.
This was Germany. National TV.
I applied for an Israeli visa, but it wasn't ready on time.
I was shocked. At that time, it was difficult to find even a computer guy knowing anything about viruses.
But I digress... Don't forget, I'm traveling with no physical evidence of having a visa.
As the company promised, everybody already knew everything about me and there was no problem at all.
Then she asked a bizarre (from my point of view) question.
I was like, WTF, is this optional? I mean, when you visit a foreign country, they always stamp your passport, no?
So, I've been to Israel with no physical evidence - neither a visa, nor a stamp in my passport.
/the end